EDIT

import com.vaadin.annotations.Widgetset;

import com.vaadin.devday.ui.MainMenu;

import com.vaadin.devday.ui.UIInitializedEvent;

import com.vaadin.navigator.ViewDisplay;

import com.vaadin.server.FontAwesome;

import com.vaadin.server.Responsive;

        mainMenu.addMenuItem(TestView2.NAME, FontAwesome.APPLE, TestView2.NAME);

        eventBus.publishEvent(new UIInitializedEvent());

    }

}