static public function isRegistered(name:String):Boolean
Returns true if passed-in name
AppSoundFactory is registred in repository.
static public function register(name:String, sf:AppSoundFactory):AppSoundFactory
Registers passed-in sf with passed-in name lib in repository.
static public function unregister(name:String):Void
Unregisters AppSoundFactory registred with
passed-in name id.
static public function getSoundFactory(name:String):AppSoundFactory
Returns AppSoundFactory registred with passed-in
name id.