     [SkinPart(required="false")]
     
     /**
+     *  The skin part that defines the appearance of the 
+     *  navigation area of the component.
+     *  By default, the ActionBarSkin class defines the navigation area to appear 
+     *  to the left of the title area.
+     *
+     *  @see spark.skins.mobile.ActionBarSkin
+     * 
      *  @langversion 3.0
      *  @playerversion Flash 10
      *  @playerversion AIR 2.5

    [ArrayElementType("mx.core.IVisualElement")]
    
    /**
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 2.5

        }
    }
    
    /**
     *  @private
     */
    override protected function partAdded(partName:String, instance:Object):void
    {
        super.partAdded(partName, instance);
