public NavigatorBreadcrumbs(final Mode mode) {
   initWidget(breadcrumbs);
   if (mode != null) {
     switch (mode) {
       case HEADER:
         breadcrumbs.removeStyleName(Constants.BREADCRUMB);
         breadcrumbs.setStyleName(NavigatorResources.INSTANCE.css().breadcrumb());
         break;
       case SECOND_LEVEL:
         breadcrumbs.addStyleName(NavigatorResources.INSTANCE.css().breadcrumb2ndLevel());
         break;
     }
   }
 }