      *  For example, you can specify a Menu, TileList, or Tree control. 
      *
      *  @default null 
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 9
+     *  @playerversion AIR 1.1
+     *  @productversion Flex 3
      */    
     public function get popUp():IUIComponent
     {

 *  Number of pixels between the divider line and the right 
 *  edge of the component.
 *  The default value is 16.
 */
[Style(name="arrowButtonWidth", type="Number", format="Length", inherit="no")]

/**
 *  Length of a close transition, in milliseconds.
 *  The default value is 250.
 */
[Style(name="closeDuration", type="Number", format="Time", inherit="no")]

/**
 *  Easing function to control component closing tween.
 */
[Style(name="closeEasingFunction", type="Function", inherit="no")]


 *  Supported classes are mx.skins.halo.PopUpIcon
 *  and mx.skins.halo.PopUpMenuIcon.
 *  @default mx.skins.halo.PopUpIcon
 *  
 *  @langversion 3.0
 *  @playerversion Flash 9
 *  @playerversion AIR 1.1
 *  @productversion Flex 3
 */
[Style(name="popUpIcon", type="Class", inherit="no")]

