Receive one message of the specified type from the test actor, verifies that the sender is the specified and calls the action that performs extra assertions. 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>(
	IActorRef sender,
	Action<T> assertMessage,
	Nullable<TimeSpan> timeout = null,
	string hint = null
)

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