private void Bindable_ItemTapped(object sender, Syncfusion.XForms.TreeView.ItemTappedEventArgs e)
        {
            var treeViewNode = e.Node;

            if (treeViewNode.ChildNodes.Count == 0)
            {
                return;
            }

            var treeView = sender as SfTreeView;

            if (treeViewNode.IsExpanded)
            {
                treeView.CollapseNode(treeViewNode);
            }
            else
            {
                treeView.ExpandNode(treeViewNode);
            }
        }
 private void TreeView_Itemapped(object sender, Syncfusion.XForms.TreeView.ItemTappedEventArgs e)
 {
     App.Current.MainPage.DisplayAlert("Item Tapped", "TreeView item tapped", "Close");
 }