public Task SendFault <T>(SendContext <T> context, Exception exception)
            where T : class
        {
            PrometheusMetrics.MeasureSend <T>(exception);

            return(Task.CompletedTask);
        }
        public Task PostSend <T>(SendContext <T> context)
            where T : class
        {
            PrometheusMetrics.MeasureSend <T>();

            return(Task.CompletedTask);
        }