code: function(oContext, oBindingInfo, bSuppressInvalidate) {
  
  			var oControl = this._oControl,
  				oBinding = oBindingInfo.binding,
  				oItem = this.createListItem(oContext, oBindingInfo);
  
  			if (oBinding.isGrouped()) {
  				// creates group header if need
  				var aItems = oControl.getItems(true),
  					oLastItem = aItems[aItems.length - 1],
  					sModelName = oBindingInfo.model,
  					oGroupInfo = oBinding.getGroup(oItem.getBindingContext(sModelName));
  
  				if (oLastItem && oLastItem.isGroupHeader()) {
  					oControl.removeAggregation("items", oLastItem, true);
  					this._fnAppendGroupItem = this.appendGroupItem.bind(this, oGroupInfo, oLastItem, bSuppressInvalidate);
  					oLastItem = aItems[aItems.length - 1];
  				}
  
  				if (!oLastItem || oGroupInfo.key !== oBinding.getGroup(oLastItem.getBindingContext(sModelName)).key) {
  					var oGroupHeader = (oBindingInfo.groupHeaderFactory) ? oBindingInfo.groupHeaderFactory(oGroupInfo) : null;
  					if (oControl.getGrowingDirection() == ListGrowingDirection.Upwards) {
  						this.applyPendingGroupItem();
  						this._fnAppendGroupItem = this.appendGroupItem.bind(this, oGroupInfo, oGroupHeader, bSuppressInvalidate);
  					} else {
  						this.appendGroupItem(oGroupInfo, oGroupHeader, bSuppressInvalidate);
  					}
  				}
  			}
  
  			oControl.addAggregation("items", oItem, bSuppressInvalidate);
  			if (bSuppressInvalidate) {
  				this._aChunk.push(oItem);
  			}
  		}
docs: appends single list item to the list