code: public static String defaultHtml(HttpServletRequest request) {
  
          CmsObject cms = CmsFlexController.getController(request).getCmsObject();
  
          // We only want the big red warning in Offline mode
          if (cms.getRequestContext().getCurrentProject().isOnlineProject()) {
              return "<div><!--Dynamic function not configured--></div>";
          } else {
              Locale locale = OpenCms.getWorkplaceManager().getWorkplaceLocale(cms);
              String message = Messages.get().getBundle(locale).key(Messages.GUI_FUNCTION_DEFAULT_HTML_0);
              return "<div style=\"border: 2px solid red; padding: 10px;\">" + message + "</div>";
          }
      }
docs: Returns the default output for functions without configured JSPs.
  
  @param request the current request
  @return the default HTML output