The PureMVC Framework Code at the Speed of Thought

Hi Cliff,

     I've been working with PureMVC framework for a while. Thanks for your wonderful works.
     Today I ran into a problem that there is no API to decide whether an instance of Facade with specific key exists without creating new one.
     So I suggest to add a simple hasCore (static) function to Facade class of PureMVC Multicore version:

               /**
       * @param multitonKey of the Core to remove
       */      
      public static function hasCore(key:String):Boolean {
         return instanceMap[ key ] != null;
      }

     Does it make sense?
     Or we have better way to do that?

     Thanks!

Jinni