public async Task Do()
{
var messages = new ConcurrentQueue<TransportMessage>();
messages.Enqueue(new TransportMessage());
messages.Enqueue(new TransportMessage());
messages.Enqueue(new TransportMessage());
var countdown = new AsyncCountdownEvent(3);
var chainFactory = new ChainFactory();
chainFactory.Register(() => new DelayElement());
chainFactory.Register(() => new LogElement());
chainFactory.Register(() => new DecrementElement(countdown));
var pushMessages = new PushMessages(messages, maxConcurrency: 1);
await pushMessages.StartAsync(tm => Connector(chainFactory, tm));
await countdown.WaitAsync();
await pushMessages.StopAsync();
}