private void Handle(ClusterActorDiscoveryMessage.UnmonitorActor m)
        {
            _log.Debug($"UnmonitorActor: Monitor={Sender.Path} Tag={m.Tag}");

            var count = _monitorItems.RemoveAll(w => w.Actor.Equals(Sender) && w.Tag == m.Tag);

            for (var i = 0; i < count; i++)
            {
                UnwatchActor(Sender, 1);
            }
        }