public TestActorRef(
	ActorSystem system,
	Props actorProps,
	IActorRef supervisor = null,
	string name = null
)

new : 
        system : ActorSystem * 
        actorProps : Props * 
        ?supervisor : IActorRef * 
        ?name : string 
(* Defaults:
        let _supervisor = defaultArg supervisor null
        let _name = defaultArg name null
*)
-> TestActorRef