      *  @playerversion AIR 2.5
      *  @productversion Flex 4.5
      */
-    public function popToFirstView(transition:ViewTransition = null):void
+    public function popToFirstView(transition:ViewTransitionBase = null):void
     {
         if (navigationStack.length < 2 || !canRemoveCurrentView())
             return;

        // This event is dispatched here to allow developers to incorporate
        // length specific changes into the view navigator transitions
        if (hasEventListener("lengthChanged"))
	        dispatchEvent(new Event("lengthChanged"));
        
        // Invalidate the actionBar properties
        if (actionBar)

    *  @productversion Flex 4
    */
    public var actionBar:ActionBar;
    
    //--------------------------------------------------------------------------
    //
