code: public static Function<Service<HttpRequest, HttpResponse>, HttpAuthService> newDecorator(
              Iterable<? extends Authorizer<HttpRequest>> authorizers) {
          return new HttpAuthServiceBuilder().add(authorizers).newDecorator();
      }
docs: Creates a new HTTP authorization {@link Service} decorator using the specified
  {@link Authorizer}s.
  
  @param authorizers a list of {@link Authorizer}s.