final ActivityManager mainActivityManager = new ActivityManager(cached, eventBus);
mainActivityManager.setDisplay(shell.getContent());
// History management
AppPlaceHistoryMapper historyMapper = appPlaceHistoryMapper;
PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(historyMapper);
historyHandler.register(placeController, eventBus, defaultPlace);
// add out UiBinder shell to the Root Panel (the main html document thingy)
RootLayoutPanel.get().add(shell);