code: public TRow getRowByRowNumber(int rowNumber) {
          if (rows == null) {
              return null;
          }
  
          TRow result = null;
          for (TRow row : rows) {
              if (row.getRowNumber() == rowNumber) {
                  result = row;
                  break;
              }
          }
          return result;
      }
docs: Get a {@link Row} by row number.
  
  @param rowNumber the row number
  @return the row by row number