void OnStyleClassDelete(EventBase evt)
{
var target = evt.target as VisualElement;
var className = target.userData as string;
// Actually remove the style class from the element in the canvas.
currentVisualElement.RemoveFromClassList(className);
// Update VisualTreeAsset.
BuilderAssetUtilities.RemoveStyleClassFromElementInAsset(
m_PaneWindow.document, currentVisualElement, className);
// We actually want to get the notification back and refresh ourselves.
m_Selection.NotifyOfHierarchyChange(null);
m_Selection.NotifyOfStylingChange(null);
evt.StopPropagation();
}
