public boolean isSet(_Fields field) {
    if (field == null) {
      throw new java.lang.IllegalArgumentException();
    }

    switch (field) {
    case DBNAME:
      return isSetDbname();
    case TABLENAME:
      return isSetTablename();
    case PARTNAME:
      return isSetPartname();
    case IS_EXTENDED:
      return isSetIsExtended();
    case TXNID:
      return isSetTxnid();
    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/ShowLocksRequest.java