@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId) {
      switch(fieldId) {
        case 1: // ROWS
          return ROWS;
        case 2: // COLS
          return COLS;
        case 3: // DATA
          return DATA;
        default:
          return null;
      }
    }
@org.apache.thrift.annotation.Nullable
    public static _Fields findByThriftId(int fieldId)