flex tree busy cursor

i am using a tree with an array collection, i have tried to run busy cursor on expa开发者_JAVA百科ndItem but now i dont know were to stop it when the tree finishes loading children,

found it :)

CursorManager.setBusyCursor() in overridden expandItem

CursorManager.removeBusyCursor(); in update complete...

private function onUpdateComplete(event:FlexEvent):void 
        {
            CursorManager.removeBusyCursor();
        }