         return null;
     }
     
+    private static var oldContentBackgroundAlpha:Number;
+    private static var contentBackgroundAlphaSetLocally:Boolean;
+
     /**
      *  @private
      */

    }
    
    /**
     *  items that should be included when rendering the focus ring.
     *  Only items of type DisplayObject or GraphicElement should be excluded. Items
     *  of other types will be ignored.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function get focusSkinExclusions():Array 
    {
        return null;
    }
    
    /**
     * Names of items that should have their <code>color</code> property defined by the <code>symbolColor</code> style.
     *  
     *  @langversion 3.0

        super.updateDisplayList(unscaledWidth, unscaledHeight);
    }
    
    override public function beginHighlightBitmapCapture():Boolean
    {
        var needRedraw:Boolean = super.beginHighlightBitmapCapture();

        // If we have a mostly-transparent content background, temporarily bump
        // up the contentBackgroundAlpha so the captured bitmap includes an opaque
        // snapshot of the background.
