/**

         *  @private

         *  If a class wants to be notified when the Application instance

         *  has been initialized, then it registers a callback here.

         *  By using a callback mechanism, we avoid adding unwanted

         *  linker dependencies on classes like HistoryManager and DragManager.

         */

        mx_internal static function registerInitCallback(initFunction:Function):void

        {

                if (!allSystemManagers || !lastSystemManager)

                {

                        return;

                }

 

                var sm:SystemManager = lastSystemManager;

 

                // If this function is called late (after we're done invoking the

                // callback functions for the last time), then just invoke

                // the callback function immediately.

                if (sm.doneExecutingInitCallbacks)

                        initFunction(sm);

                else

                        sm.initCallbackFunctions.push(initFunction);

        }

//----------------------------------

    //  application

    //----------------------------------

 

        /**

         *  The application parented by this SystemManager.

         *  SystemManagers create an instance of an Application

         *  even if they are loaded into another Application.

         *  Thus, this may not match mx.core.Application.application

         *  if the SWF has been loaded into another application.

         *  <p>Note that this property is not typed as mx.core.Application

         *  because of load-time performance considerations

         *  but can be coerced into an mx.core.Application.</p>

         */

        public function get application():IUIComponent

        {

                return IUIComponent(_document);

        }