code: function(oCellRef) {
  			var oInfo = TableGrouping.TableUtils.getCellInfo(oCellRef);
  
  			if (oInfo.isOfType(TableGrouping.TableUtils.CELLTYPE.DATACELL)) {
  				return oInfo.cell.parent().hasClass("sapUiTableGroupHeader");
  			} else if (oInfo.isOfType(TableGrouping.TableUtils.CELLTYPE.ROWHEADER | TableGrouping.TableUtils.CELLTYPE.ROWACTION)) {
  				return oInfo.cell.hasClass("sapUiTableGroupHeader");
  			}
  
  			return false;
  		}
docs: Returns whether the given cell is located in a group header.
  
  @param {jQuery | HTMLElement} oCellRef DOM reference of table cell.
  @returns {boolean} Whether the element is in a group header row.