code: public static ResourceBundle load(String jellyUrl) {
          if(jellyUrl.endsWith(".jelly"))    // cut the trailing .jelly
              jellyUrl = jellyUrl.substring(0,jellyUrl.length()-".jelly".length());
  
          JellyFacet facet = WebApp.getCurrent().getFacet(JellyFacet.class);
          return facet.resourceBundleFactory.create(jellyUrl);
      }
docs: Loads the resource bundle associated with the Jelly script.