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

        // Couldn't find item renderer.  Throw an RTE.
        if (!myItemRenderer && failRTE)
        {
            if (item is IVisualElement || item is DisplayObject)
                throw new Error("DataGroup cannot display visual elements directly unless the elements " + 
                        "are display objects and implement IVisualElement");
            else
                throw new Error("Could not create an item renderer for " + item);
        }

        return myItemRenderer;

     */
    override public function addChild(child:DisplayObject):DisplayObject
    {
        throw(new Error(resourceManager.getString("components", "methodUnavailable")));
    }
    
    /**
