code: private void navigateToFragment() {
  
          String fragment = getPage().getUriFragment();
          if (fragment != null) {
              getNavigator().navigateTo(fragment);
          } else {
              CmsObject cms = getCmsObject();
              String target = CmsLoginHelper.getStartView(cms);
              if (target != null) {
                  if (target.startsWith("#")) {
                      getNavigator().navigateTo(target.substring(1));
                  } else {
                      Page.getCurrent().setLocation(OpenCms.getLinkManager().substituteLink(cms, target));
                  }
              } else {
                  showHome();
              }
          }
      }
docs: Navigates to the current URI fragment.<p>