      */
     override public function addChild(child:DisplayObject):DisplayObject
     {
-        throw(new Error("This method is not available in this class.  Please consult the documentation."));
+        throw(new Error(resourceManager.getString("components", "methodUnavailable")));
     }
     
     /**

    public function addElementAt(element:IVisualElement, index:int):IVisualElement
    {
        if (element == this)
            throw new ArgumentError("Cannot add yourself as a child of yourself");
            
        // check for RangeError:
        checkForRangeError(index, true);

     */
    override public function swapChildrenAt(index1:int, index2:int):void
    {
        throw(new Error(resourceManager.getString("components", "methodUnavailable")));
    }
    
}
