def referred = 5;
def a = &referred;
a = 10;
log(referred); # 10
log(*a + referred); # 20
def x = 5;
if (x is 10) { # "is" is interchangeable with "=="
log("hello world");
} else {
log("bye world");
}
if (x is not 10) { # "is not" is interchangeable with "!="
log("hello world");
} else {
log("bye world");
}