I have a question, in Unit 2 lesson 3 there is PerformanceCounterActor, and in this actor ICancelable is used for cancelling scheduled sending of GatherMetrics messages. This object is created in construtor, and used in PreStart, PostStop methods. This means that it will be reused when actor is restarted. Is this correct/recomended usage? Wouldn't be better to create seperate ICancellable object every time actor is started?