@org.apache.thrift.annotation.Nullable
      public static _Fields findByThriftId(int fieldId) {
        switch(fieldId) {
          case 1: // VARS
            return VARS;
          case 2: // ROW_OFFSET
            return ROW_OFFSET;
          case 3: // COL_OFFSET
            return COL_OFFSET;
          case 4: // ROWS
            return ROWS;
          case 5: // COLS
            return COLS;
          case 6: // FORMAT
            return FORMAT;
          default:
            return null;
        }
      }
@org.apache.thrift.annotation.Nullable
      public static _Fields findByThriftId(int fieldId)