Initialization of an ActorRefProvider happens in two steps: first construction of the object with settings, eventStream, etc. and then—when the ActorSystem is constructed—the second phase during which actors may be created (e.g. the guardians).

public virtual void Init(
	ActorSystemImpl system
)

abstract Init : 
        system : ActorSystemImpl -> unit 
override Init : 
        system : ActorSystemImpl -> unit