     
     /**
      *  @copy flex.intf.IViewport#horizontalScrollPosition
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     public function get horizontalScrollPosition():Number 
     {

    
    /**
     *  @copy mx.core.UIComponent#measure
     */
    public function measure():void
    {

     * 
     *  @return The bounds of the target's scrollRect in layout coordinates, null
     *      if target or clipAndEnableScrolling is false. 
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    protected function getTargetScrollRect():Rectangle
    {
