code: public WritableCellFormat getCellFormat(boolean create)
      {
          WritableCellFormat ret = null;
          if(cellFormat != null)
              ret = cellFormat;
          else if(create)
              ret = new WritableCellFormat(NumberFormats.TEXT);
          return ret;
      }
docs: Returns the format object for this column.
  @param create <CODE>true</CODE> if the format object should be created if it doesn't exist
  @return The format object for this column