ActivityMapper westActivityMapper = new WestActivityMapper(clientFactory);
ActivityManager westActivityManager = new ActivityManager(westActivityMapper, eventBus);
westActivityManager.setDisplay(westDisplay);
// Start PlaceHistoryHandler with our PlaceHistoryMapper
AppPlaceHistoryMapper historyMapper = GWT.create(AppPlaceHistoryMapper.class);
PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(historyMapper);
historyHandler.register(placeController, eventBus, defaultPlace);
RootLayoutPanel.get().add(dockLayoutPanel);