Receive one message of the specified type from the test actor and assert that the given predicate accepts it and was sent by a sender that matches the isSender predicate. Wait time is bounded by the given duration if specified. If not specified, wait time is bounded by remaining time for execution of the innermost enclosing 'within' block, if inside a 'within' block; otherwise by the config value "akka.test.single-expect-default". Use this variant to implement more complicated or conditional processing.

public T ExpectMsgFrom<T>(
	Predicate<IActorRef> isSender,
	Predicate<T> isMessage,
	Nullable<TimeSpan> timeout = null,
	string hint = null
)

member ExpectMsgFrom : 
        isSender : Predicate<IActorRef> * 
        isMessage : Predicate<'T> * 
        ?timeout : Nullable<TimeSpan> * 
        ?hint : string 
(* Defaults:
        let _timeout = defaultArg timeout null
        let _hint = defaultArg hint null
*)
-> 'T