private void AddToSelectionNoUndoRecord(GraphElement graphElement)
{
graphElement.selected = true;
selection.Add(graphElement);
graphElement.OnSelected();
// To ensure that the selected GraphElement gets unselected if it is removed from the GraphView.
graphElement.RegisterCallback <DetachFromPanelEvent>(OnSelectedElementDetachedFromPanel);
contentViewContainer.Dirty(ChangeType.Repaint);
}
