FunctionImport with multiple results don't support ComplexTypes as return

[artur-moreira]

On the method "GetModelEntitySets" when the stored procedure has more than one result, he tries to find the returnClrType as EntitySets, throwing an exception "clrType for method {methodInfo.Name} is not supported in conceptual model as entity set".

If we can validate that the return type is not a primitive type, in this case is a pair of ComplexTypes, and return null on this method; it actually works as expected.