Analytics { public void flush() { client.flush(); } Analytics(
      AnalyticsClient client,
      List<MessageTransformer> messageTransformers,
      List<MessageInterceptor> messageInterceptors,
      Log log); static Builder builder(String writeKey); void enqueue(MessageBuilder builder); void flush(); void shutdown();  }
@Test public void flushIsDispatched() { analytics.flush(); verify(client).flush(); }