Akka.Streams.Tests.IO.TcpHelper.ServerConnection.ExpectClosed C# (CSharp) Method

            public void ExpectClosed(Predicate<Tcp.ConnectionClosed> isMessage, TimeSpan? max = null)
            {
                max = max ?? TimeSpan.FromSeconds(3);

                _connectionActor.Tell(new PingClose(_connectionProbe.Ref));
                _connectionProbe.FishForMessage(isMessage, max);
            }