public static function updateObjectNotificationViews(PhabricatorUser $user, $object_phid)
 {
     if (PhabricatorEnv::isReadOnly()) {
         return;
     }
     $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
     $notification_table = new PhabricatorFeedStoryNotification();
     $conn = $notification_table->establishConnection('w');
     queryfx($conn, 'UPDATE %T
    SET hasViewed = 1
    WHERE userPHID = %s
      AND primaryObjectPHID = %s
      AND hasViewed = 0', $notification_table->getTableName(), $user->getPHID(), $object_phid);
     unset($unguarded);
     $count_key = PhabricatorUserNotificationCountCacheType::KEY_COUNT;
     PhabricatorUserCache::clearCache($count_key, $user->getPHID());
     $user->clearCacheData($count_key);
 }