code: function(oExtension) {
  			var oTable = oExtension.getTable();
  			var oIN = oTable._getItemNavigation();
  			var oTableRef = oTable.getDomRef();
  
  			if (!oExtension.getAccMode() || !oTableRef || !oIN) {
  				return null;
  			}
  			var oCellRef = oIN.getFocusedDomRef();
  			if (!oCellRef || oCellRef !== document.activeElement) {
  				return null;
  			}
  
  			return TableUtils.getCellInfo(oCellRef);
  		}
docs: If the current focus is on a cell of the table, this function returns
  the cell type and the jQuery wrapper object of the corresponding cell:
  
  @param {sap.ui.table.TableAccExtension} oExtension The accessibility extension.
  @returns {sap.ui.table.TableUtils.CellInfo} An object containing information about the cell.