CustomTreeItem SAP SE The <code>CustomTreeItem</code> control with a content aggregation is used to customize the tree items within the <code>Tree</code> control.<br><b>Note:</b> Even though the content aggregation can be used for any control, complex responsive layout controls, such as <code>Table, Form</code> etc, should not be aggregated as content. 1.48.0 sap.m/TreeItemBase The content of this tree item.