Akka.Streams.Tests.Dsl.SinkSpec.A_Sink_must_be_composable_with_importing_1_modules C# (CSharp) Method

        public void A_Sink_must_be_composable_with_importing_1_modules()
        {
            var probes = CreateProbes();
            var sink = Sink.FromGraph(GraphDsl.Create(Sink.FromSubscriber(probes[0]), (b, shape) =>
            {
                var broadcast = b.Add(new Broadcast<int>(3));
                b.From(broadcast.Out(0)).Via(Flow.Create<int>().Where(x => x == 0)).To(shape.Inlet);
                b.From(broadcast.Out(1))
                    .Via(Flow.Create<int>().Where(x => x == 1))
                    .To(Sink.FromSubscriber(probes[1]));
                b.From(broadcast.Out(2))
                    .Via(Flow.Create<int>().Where(x => x == 2))
                    .To(Sink.FromSubscriber(probes[2]));
                return new SinkShape<int>(broadcast.In);
            }));
            Source.From(new[] { 0, 1, 2 }).RunWith(sink, Materializer);

            var subscriptions = probes.Select(p => p.ExpectSubscription()).ToList();
            subscriptions.ForEach(s => s.Request(3));
            for (var i = 0; i < probes.Length; i++)
                probes[i].ExpectNext(i);
            probes.ForEach(p => p.ExpectComplete());
        }