code: public static Stopwatch start(String name, TagList list, TimeUnit unit) {
      final MonitorConfig config = new MonitorConfig.Builder(name).withTags(list).build();
      return INSTANCE.get(config, unit).start();
    }
docs: Returns a stopwatch that has been started and will automatically
  record its result to the dynamic timer specified by the given config. The timer
  uses a TimeUnit of milliseconds.