map3.setActive(false);
maps.add(map3);
MouseHandler mouseHandler = new MouseHandler(this, maps);
eventDispatcher.addBroadcaster(mouseHandler);
KeyboardHandler keyboardHandler = new KeyboardHandler(this, maps);
eventDispatcher.addBroadcaster(keyboardHandler);
// See class description for detailed explanation of these registrations.
eventDispatcher.register(map1, "pan");
eventDispatcher.register(map1, "zoom");