     }
     
     /**
-     *  @copy mx.core.IViewport#verticalScrollPositionDelta()
+     *  @inheritDoc
      */
     public function verticalScrollPositionDelta(unit:uint):Number
     {

    //----------------------------------

    /**
     *  @copy mx.core.IViewport#horizontalScrollPositionDelta
     */
    public function horizontalScrollPositionDelta(unit:uint):Number
    {

    [Bindable]
    
    /**
     *  @inheritDoc
     */
    public function get verticalScrollPosition():Number 
    {
