     private function transitionComplete(event:Event):void
     {
         ViewTransitionBase(event.target).removeEventListener(FlexEvent.TRANSITION_END, transitionComplete);
-        
+
         if (hasEventListener(FlexEvent.TRANSITION_END))
             dispatchEvent(new FlexEvent(FlexEvent.TRANSITION_END, false, false));
 

    private function startViewTransition(event:Event):void
    {
        removeEventListener(Event.ENTER_FRAME, startViewTransition);
        
//        CONFIG::performanceInstrumentation
        {
            if (hasEventListener(FlexEvent.TRANSITION_START))
                dispatchEvent(new FlexEvent(FlexEvent.TRANSITION_START, false, false));
        }
        
		activeTransition.play();
    }
    

     *  @private
     */ 
    private var emptyViewDescriptor:ViewDescriptor = null;
        
    /**
     *  @private
     *  This following property stores the <code>mouseEnabled</code>
