private InternalTestActorRef(ActorSystem system, Props props, MessageDispatcher dispatcher, Func<Mailbox> createMailbox, IInternalActorRef supervisor, ActorPath path) //TODO: switch from Func<Mailbox> createMailbox to MailboxType mailboxType : base(system, props, dispatcher, createMailbox, supervisor, path, actorRef => NewActorCell(system, actorRef, props, dispatcher, supervisor, createMailbox)) { }