public async Task InitializeChannelAsync(CancellationToken cancellationToken)
{
_testHost = new TestHost(
_blipTestHostChannelSettings.AssemblyReference,
_blipTestHostChannelSettings.MessageTimeout,
_blipTestHostChannelSettings.NotificationTimeout
);
var eventTrackExtension = Substitute.For <IEventTrackExtension>();
var container = await _testHost.AddRegistrationAndStartAsync(eventTrackExtension);
}