code: function _clearGlobals() {
  		SOURCE_NODE = null;
  		SOURCE_NODE_LIST = null;
  		if ($sourceList) {
  			$sourceList.removeClass(classDragSource + " " + classDragRemove);
  		}
  		$sourceList = null;
  		DRAG_ENTER_RESPONSE = null;
  		DRAG_OVER_STAMP = null;
  	}
docs: Time when a node entered the 'over' hitmode /*