 
 import flash.display.DisplayObject;
 import mx.core.IFlexDisplayObject;
+import mx.core.IFlexModuleFactory;
 import mx.core.Singleton;
 
 /**

    public static function addPopUp(window:IFlexDisplayObject,
                    parent:DisplayObject,
                    modal:Boolean = false,
                    childList:String = null):void
    {
		impl.addPopUp(window, parent, modal, childList);
    }

    /**

     *  <code>PopUpManagerChildList.POPUP</code>, 
     *  or <code>PopUpManagerChildList.PARENT</code> (default).
     *
     *  @param moduleFactory The moduleFactory where this pop-up should look for
     *  its embedded fonts and style manager.
     * 
     *  @see PopUpManagerChildList
     *  
     *  @langversion 3.0
