docs: public static Deferred<Annotation> getAnnotation(final TSDB tsdb, 
        final String tsuid, final long start_time) {
      if (tsuid != null && !tsuid.isEmpty()) {
        return getAnnotation(tsdb, UniqueId.stringToUid(tsuid), start_time);
      }
      return getAnnotation(tsdb, (byte[])null, start_time);
    }