public Task UpdateBeatInfo(List <Instance> modifiedInstances) { foreach (var instance in modifiedInstances) { string key = beatReactor.BuildKey(instance.ServiceName, instance.Ip, instance.Port); if (beatReactor.Dom2Beat.ContainsKey(key) && instance.Ephemeral) { BeatInfo beatInfo = beatReactor.BuildBeatInfo(instance); beatReactor.AddBeatInfo(instance.ServiceName, beatInfo); } } return(Task.CompletedTask); }