public async Task <IWorkflowInstanceResponse> Send()
        {
            var asyncReply = client.CreateWorkflowInstanceAsync(request);
            var response   = await asyncReply.ResponseAsync;

            return(new WorkflowInstanceResponse(response));
        }
        public async Task <IWorkflowInstanceResponse> Send(TimeSpan?timeout = null)
        {
            var asyncReply = client.CreateWorkflowInstanceAsync(request, deadline: timeout?.FromUtcNow());
            var response   = await asyncReply.ResponseAsync;

            return(new WorkflowInstanceResponse(response));
        }