/// <summary>
/// Causes the Actor to become a different kind of actor.
/// This has little if any use with the current design
/// because messages are delivered to individual OnReceive()
/// methods.
/// </summary>
/// <param name="receive">the Receive to which messages are dispatched</param>
/// <param name="discardOld">the bool that if set causes an Unbecome() before the Become()</param>
public void Become(Receive receive, bool discardOld = true)
{
if (discardOld)
{
Unbecome();
}
Receive = receive;
Receivers.Push(receive);
Channel.ClearSubscribers();
Channel.Subscribe(Fiber, GetOnReceiveDelegate());
}