private IEnumerable <Notification> GetUsersNotifications(IEnumerable <int> userIds, string action, IEnumerable <int> nodeIds, Guid objectType)
 {
     using (var uow = _uowProvider.GetUnitOfWork())
     {
         var repository = new NotificationsRepository(uow);
         var ret        = repository.GetUsersNotifications(userIds, action, nodeIds, objectType);
         uow.Commit();
         return(ret);
     }
 }