      */
     public function setElementIndex(element:IVisualElement, index:int):void
     {
-        throw new ArgumentError("This operation is not supported");
+        throw new ArgumentError(resourceManager.getString("components", "operationNotSupported"));
     }
     
     /**

     */
    public function removeElement(element:IVisualElement):IVisualElement
    {
        throw new ArgumentError("This operation is not supported");
    }
    
    /**

     */
    public function swapElements(element1:IVisualElement, element2:IVisualElement):void
    {
        throw new ArgumentError(resourceManager.getString("components", "operationNotSupported"));
    }
    
    /**
