code: function(cellIndex) {
          for (var p=0;p<this.pages.length;++p) {
              var cal = this.pages[p];
              cal.selectCell(cellIndex);
          }
          return this.getSelectedDates();
      }
docs: Selects dates in the CalendarGroup based on the cell index provided. This method is used to select cells without having to do a full render. The selected style is applied to the cells directly.
  The value of the MULTI_SELECT Configuration attribute will determine the set of dates which get selected.
  <ul>
  <li>If MULTI_SELECT is false, selectCell will select the cell at the specified index for only the last displayed Calendar page.</li>
  <li>If MULTI_SELECT is true, selectCell will select the cell at the specified index, on each displayed Calendar page.</li>
  </ul>
  @method selectCell
  @param {Number} cellIndex The index of the cell to be selected.
  @return {Date[]} Array of JavaScript Date objects representing all individual dates that are currently selected.