public byte[] getNulls() {
    setNulls(org.apache.thrift.TBaseHelper.rightSize(nulls));
    return nulls == null ? null : nulls.array();
  }
Returns true if field values is set (has been assigned a value) and false otherwise
service-rpc/src/gen/thrift/gen-javabean/org/apache/hive/service/rpc/thrift/TI16Column.java