public OtherTypeNotificationViewModel(NotificationInfo info, DateTime insertTime, string message, bool isError)
     : base(insertTime)
 {
     _model = info;
     _message = message;
     _isError = isError;
 }
 async Task<NotificationViewModel> WrapViewModel(NotificationInfo item, DateTime insertTime)
 {
     NotificationViewModel itemVM = null;
     if ((int)(item.Type & (NotificationFlag.Mension | NotificationFlag.Response | NotificationFlag.Followup | NotificationFlag.PlusOne)) > 0)
         itemVM = await NotificationWithActivityViewModel.Create((NotificationInfoWithActivity)item, insertTime);
     else if ((int)(item.Type & NotificationFlag.CircleIn) > 0)
         itemVM = new NotificationWithProfileViewModel((NotificationInfoWithActor)item, insertTime);
     return itemVM;
 }
 NotificationViewModel WrapViewModel(NotificationInfo item, DateTime insertTime)
 {
     if (item is NotificationInfoWithActivity)
     {
         var itemInf = (NotificationInfoWithActivity)item;
         var itemVm = new NotificationWithActivityViewModel(itemInf, new Activity(itemInf.Activity), insertTime);
         itemVm.Activate();
         return itemVm;
     }
     else if (item is NotificationInfoWithActor)
         return new NotificationWithProfileViewModel((NotificationInfoWithActor)item, insertTime);
     else
         return new OtherTypeNotificationViewModel(item, insertTime, "未対応通知。ブラウザで確認して下さい。", false);
     throw new ArgumentException("引数itemに適用できるVMが存在しません。");
 }