             
             addCloseOnResizeTrigger();
             
-			if (openButton && openButton.systemManager)
-            	openButton.systemManager.getSandboxRoot().addEventListener(MouseEvent.MOUSE_WHEEL, systemManager_mouseWheelHandler);
+            if (openButton && openButton.systemManager)
+                openButton.systemManager.getSandboxRoot().addEventListener(MouseEvent.MOUSE_WHEEL, systemManager_mouseWheelHandler);
         }
     }
     

    {
        if (_openButton === value)
            return;
		
        removeOpenTriggers();
            
        _openButton = value;

        return _openButton;
    }
    
    /**
     *  @private 
     */
    private var _systemManager:ISystemManager;

    /**
     *  A reference to the <code>SystemManager</code> used 
     *  for mouse tracking.  if none is specified, the controller
     *  will use the systemManager associated with the openButton.
     *         
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function set systemManager(value:ISystemManager):void
    {
        _systemManager = value; 
    }
    /**
     *  @private 
     */
    public function get systemManager():ISystemManager
    {
        return (_systemManager != null)?  _systemManager:
                (openButton != null)?  openButton.systemManager:
                                        null;
    }
    
    /**
     *  A list of display objects to consider part of the hit area
     *  of the drop down.  Mouse clicks within any component listed
     *  as an inclusion will not automatically close the drop down.
     *         
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public var hitAreaAdditions:Vector.<DisplayObject>;
    
    //----------------------------------
    //  dropDown
    //----------------------------------
