code: @Override
    protected Client createClient(String configServiceName)
        throws GeneralSecurityException, IOException {
      return new Client.Builder(configServiceName)
          .setStatsLogFrequency(statsLogFrequency())
          .setHttpTransport(UrlFetchTransport.getDefaultInstance())
          .setFactory(ThreadManager.backgroundThreadFactory())
          .build();
    }
docs: {@inheritDoc}