public PersistentHubChildrenLifetimeTest(PersistentHubFixture fixture) : base(fixture)
{
Infrastructure = fixture.Infrastructure;
var actorOfAsTestActorRef = ActorOfAsTestActorRef <PersistentHubActor>(Infrastructure.CreateHubProps(Node.System),
"TestHub_" + Guid.NewGuid());
_hub = actorOfAsTestActorRef.UnderlyingActor;
_hubRef = actorOfAsTestActorRef.Ref;
}