     [ArrayElementType("mx.core.IVisualElement")]
     
     /**
-     *  The set of items that become the content of
-     *  the controlBarGroup
+     *  The set of components to include in the control bar area of the 
+     *  Panel container. 
+     *  The location and appearance of the control bar area of the Panel container 
+     *  is determined by the spark.skins.spark.PanelSkin class. 
+     *  By default, the PanelSkin class defines the control bar area to appear at the bottom 
+     *  of the content area of the Panel container with a grey background. 
+     *  Create a custom skin to change the default appearance of the control bar.
+     *
+     *  @default null
+     *
+     *  @see spark.skins.spark.PanelSkin
      *  
      *  @langversion 3.0
      *  @playerversion Flash 10


    /**
     *  The skin part that defines the appearance of the 
     *  control bar in the container.
     *
     *  @see spark.skins.spark.PanelSkin
     *  

    //---------------------------------- 
    
    /**
     *  Defines the layout of the control bar area of the container.
     *
     *  @default HorizontalLayout
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
