docs: public static <T extends RestfulGateway> Optional<StaticFileServerHandler<T>> tryLoadWebContent(
  			GatewayRetriever<? extends T> leaderRetriever,
  			Time timeout,
  			File tmpDir) throws IOException {
  
  		if (isFlinkRuntimeWebInClassPath()) {
  			return Optional.of(new StaticFileServerHandler<>(
  				leaderRetriever,
  				timeout,
  				tmpDir));
  		} else {
  			return Optional.empty();
  		}
  	}