      */
     private var _popUpChildren:WindowedSystemChildrenList;
 
+    //----------------------------------
+    //  preloadedRSLs
+    //----------------------------------
+    
+    /**
+     *  @private
+     * 
+     *  This is a stub to satisfy the IFlexModuleFactory interface.
+     * 
+     *  The RSLs loaded by this system manager before the application 
+     *  starts. RSLs loaded by the application are not included in this list.
+     * 
+     *  Information about preloadedRSLs is stored in a Dictionary. The key is
+     *  the RSL's LoaderInfo. The value is the url the RSL was loaded from.
+     */
+    public function  get preloadedRSLs():Dictionary
+    {
+        return null;                
+    }
+    
     /**
      *  @inheritDoc
      *  

		dispatchEvent(dynamicEvent);
    }
    
    
    /**
     *  Returns <code>true</code> if the given DisplayObject is the 
     *  top-level window.

import mx.core.IChildList;
import mx.core.IFlexDisplayObject;
import mx.core.IFlexModule;
import mx.core.IFlexModuleFactory;
import mx.core.IUIComponent;
import mx.core.Singleton;
import mx.core.IWindow;
