MaterializedField field = MaterializedField.create(defBuilder.build());
// Create a new value vector for 1024 integers
NullableVarCharVector v = new NullableVarCharVector(field, allocator);
NullableVarCharVector.Mutator m = v.getMutator();
v.allocateNew(1024*10, 1024);
// Create and set 3 sample strings
String str1 = new String("AAAAA1");
String str2 = new String("BBBBBBBBB2");
String str3 = new String("CCCC3");