A GUI application's version of the main method.
Installed reaction won't receive events from the given publisher anylonger.
Returns string formatted according to given
Listen to the given publisher as long as
deafTo isn't called for
Initializes the application and runs the given program.
Finalizes the application by calling
shutdown and exits.
All reactions of this reactor.
Called before the application is exited.
top, packs the frame, and displays it.