akka.actor.FSM
Send this to an akka.actor.FSM to request first the FSM.CurrentState and then a series of FSM.Transition updates. Cancel the subscription using FSM.UnsubscribeTransitionCallBack.
Send this to an akka.actor.FSM to request first the FSM.CurrentState and then a series of FSM.Transition updates. Cancel the subscription using FSM.UnsubscribeTransitionCallBack.