/// <summary>
/// Select fist node with subnodes and measure how much time it's takes.
/// </summary>
public void SelectFirstNodeWithSubnodes()
{
Utilites.CheckRunTime(() => Tree.SelectNodeWithSubnodes(Nodes[0]));
}
/// <summary>
/// Toggle node IsExpanded and measure how much time it's takes.
/// </summary>
/// <param name="node">Node.</param>
protected virtual void NodeToggle(TreeNode <TreeViewItem> node)
{
Utilites.CheckRunTime(() => node.IsExpanded = !node.IsExpanded, "nodes: " + node.TotalNodesCount);
}