///<summary>
/// Register async Callback on the Respond Action at the server
///</summary>
public XtResult RespondAsync <T, TResult>(Func <T, Task <TResult> > factory, CancellationToken cancellationToken = default)
where T : class, new()
where TResult : class
{
var responseHandler = ResponseHandler <T, TResult> .ASync(factory);
return(SetupResponder(responseHandler, cancellationToken));
}