presto-hive/src/main/java/io/prestosql/plugin/hive/util/HiveWriteUtils.java/VarcharFieldSetter/VarcharFieldSetter
class VarcharFieldSetter:        public VarcharFieldSetter(SettableStructObjectInspector rowInspector, Object row, StructField field, Type type)
        {
            super(rowInspector, row, field);
            this.type = type;
        }