public async Task Test_Remove_Existence_Succeed()
{
var sys = Setup();
var testActor = ActorOf(BlackHoleActor.Props);
sys.Containers[0].Tell(new Message.Add(10, testActor));
sys.Containers[0].Tell(new Message.Remove(10));
await Task.Delay(100);
var reply = await sys.Table.Ask<Message.GetReply>(new Message.Get(10));
Assert.Equal(10, reply.Id);
Assert.Null(reply.Actor);
}