@Override
  public ToolBar initToolBar() {
    SubModuleToolbar toolbar = new SubModuleToolbar(getEventBus());

    final Button importUser = new Button();

    importUser.setText(I18nUtils.getMessages().user_button_importUsers());
    importUser.setTitle(I18nUtils.getMessages().user_button_importUsers_tip());
    importUser.setIcon(AbstractImagePrototype.create(Icons.INSTANCE.user()));
    importUser.enable();
    importUser.addListener(
        Events.OnClick,
        new Listener<BaseEvent>() {

          public void handleEvent(BaseEvent be) {
            initUserImportView();
          }
        });
    toolbar.add(importUser);

    return toolbar;
  }