private void TapGestureRecognizer_Tapped(object sender, EventArgs e)
{
var imageIcon = sender as Image;
var treeViewNode = imageIcon.BindingContext as TreeViewNode;
if (treeViewNode.IsExpanded)
{
TreeView.CollapseNode(treeViewNode);
}
else
{
TreeView.ExpandNode(treeViewNode);
}
}
