private void PreselectItem([NotNull] object sender, [NotNull] MouseButtonEventArgs e)
{
Debug.ArgumentNotNull(sender, nameof(sender));
Debug.ArgumentNotNull(e, nameof(e));
var treeViewItem = TreeViewItemExtensions.VisualUpwardSearch <TreeViewItem>(e.OriginalSource as DependencyObject) as TreeViewItem;
if (treeViewItem != null)
{
treeViewItem.IsSelected = true;
}
}
