docs: public Observable<ServiceResponse<Map<String, String>>> listEndpointsWithServiceResponseAsync(UUID appId) {
          if (this.client.endpoint() == null) {
              throw new IllegalArgumentException("Parameter this.client.endpoint() is required and cannot be null.");
          }
          if (appId == null) {
              throw new IllegalArgumentException("Parameter appId is required and cannot be null.");
          }
          String parameterizedHost = Joiner.on(", ").join("{Endpoint}", this.client.endpoint());
          return service.listEndpoints(appId, this.client.acceptLanguage(), parameterizedHost, this.client.userAgent())
              .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<Map<String, String>>>>() {
                  @Override
                  public Observable<ServiceResponse<Map<String, String>>> call(Response<ResponseBody> response) {
                      try {
                          ServiceResponse<Map<String, String>> clientResponse = listEndpointsDelegate(response);
                          return Observable.just(clientResponse);
                      } catch (Throwable t) {
                          return Observable.error(t);
                      }
                  }
              });
      }