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

    
    /**
     * Constructor.
     */
    public function GroupBase()
    {

 *  The backgrounds of the list items alternate among the colors in the array. 
 * 
 *  @default undefined
 *  
 *  @langversion 3.0
 *  @playerversion Flash 10
 *  @playerversion AIR 1.5
 *  @productversion Flex 4
 */
[Style(name="alternatingItemColors", type="Array", arrayType="uint", format="Color", inherit="yes")]

