[flexcoders] Exit effect for popup when being removed

[Boon Chew]

Hi,

What's the best way to have a popup menu play an exit effect when it is about 
to be removed by PopUpManager.removePopUp?

Should we play the effect first (say dissolve or wipe up), then on effect end 
call  removePopUp, or is there a more direct / simpler way?

- boon