 import mx.events.PropertyChangeEvent;
 import mx.managers.ISystemManager;
 import mx.modules.ModuleManager;
+
+use namespace mx_internal;  // for mx_internal function mirrorTree
 
 //--------------------------------------
 //  Styles

        }
    }
    
    //--------------------------------------------------------------------------
    //
    // Skin states support

{

import flash.display.DisplayObject;
import flash.events.Event;
import flash.geom.Point;
import flash.system.ApplicationDomain;
