/// <summary>
/// Pops the stack of the behaviors that the Actor may have
/// and sets the OnReceiveDelegate to the previous.
/// </summary>
public void Unbecome()
{
if (Receivers.Count > 1)
{
Receivers.Pop();
}
Receive = Receivers.Pop();
Channel.ClearSubscribers();
Channel.Subscribe(Fiber, GetOnReceiveDelegate());
}