actionscript 3 - Flash Builder Code completion for events -

when i'm using built-in eventdispatcher code completion show list of events fired class, example:

how can achieve same own classes, example might extend event class this:

import flash.events.event;  public class myevent extends event {      //event types     public static const first_event:string = 'firstevent';     public static const second_event:string = 'secondevent';      //construct     public function myevent(type:string, bubbles:boolean=false, cancelable:boolean=false)     {         super(type, bubbles, cancelable);     } } 

and might write eventdispatcher this:

import flash.events.eventdispatcher; import flash.events.ieventdispatcher;  public class myeventdispatcher extends eventdispatcher {     public function foo() :void{         dispatchevent(new myevent(myevent.first_event));     }      public function bar() :void{         dispatchevent(new myevent(myevent.second_event));     }  } 

what can make events appear in code completion box?

i aware can use metadata above class, this:

[event(name="firstevent", type="my.myevent")] [event(name="secondevent", type="my.myevent")] 

but mxml, , code completion knows string value ("firstevent"), not const (myevent.first_event).

i using flash builder 4.7.