public virtual JsonResult Meetings_Update([DataSourceRequest] DataSourceRequest request, MeetingViewModel meeting)
        {
            if (ModelState.IsValid)
            {
                meetingService.Update(meeting, ModelState);
            }

            return Json(new[] { meeting });
        }
        public virtual JsonResult Meetings_Create([DataSourceRequest] DataSourceRequest request, MeetingViewModel meeting)
        {
            if (ModelState.IsValid)
            {
                meetingService.Insert(meeting, ModelState);
            }

            return Json(new[] { meeting }.ToDataSourceResult(request, ModelState));
        }