public async Task Can_Send_ProtoBuf_request_Async()
{
var client = new ProtoBufServiceClient(ListeningOn) {
RequestFilter = req =>
Assert.That(req.Accept, Is.EqualTo(MimeTypes.ProtoBuf))
};
var request = CreateProtoBufEmail();
var response = await client.SendAsync<ProtoBufEmail>(request);
response.PrintDump();
Assert.That(response.Equals(request));
}