public virtual void OnNodeRemoved( object sender, NodeRemoveEventArgs args )
 {
     Gtk.TreeIter iter = args.Node.InnerIter;
     store.Remove( ref iter );
     QueueDraw();
 }
 public virtual void OnNodeRemoved(object sender, NodeRemoveEventArgs args)
 {
     Gtk.TreeIter iter = args.Node.InnerIter;
     Store.Remove(ref iter);
 }