public async Task<AsyncClosable> StartAsync(
EndpointConfiguration.ReadOnly configuration,
Func<TransportMessage, Task> onMessage)
{
MessageReceiver client =
await this.factory
.CreateMessageReceiverAsync(configuration.DestinationQueue(), ReceiveMode.PeekLock)
.ConfigureAwait(false);
OnMessageOptions options = configuration.Options();
options.ExceptionReceived += (sender, args) => HandleExceptionReceived(configuration.DestinationQueue(), args);
configuration.Configure(client).OnMessageAsync(brokeredMessage => onMessage(new TransportMessage(brokeredMessage)), options);
return new AsyncClosable(client.CloseAsync);
}