static function countSinceLastVisit(IUser $user)
 {
     $query = self::getDBQuery($user, 100, ConfigOptions::getValueFor('fmn_last_visited', $user));
     if ($query) {
         $result = DB::execute($query);
         if ($result instanceof DBResult) {
             return $result->count();
         }
         // if
     } else {
         return 0;
     }
 }