This method is called when the window is closing, after all other window event listeners have been processed.
At most one component.
Installed reaction won't receive events from the given publisher anylonger.
Listen to the given publisher as long as
deafTo isn't called for
The menu bar of this frame or
NoMenuBar if no menu bar is set.
Set the current menu bar of this frame.
The underlying Swing peer.
Notify all registered reactions.
All reactions of this reactor.