docs: public Set<Subscriber> findUsersForNotification(String notificationDispatcherKey, String notificationChannelKey, @Nullable String projectKey) {
      try (DbSession session = mybatis.openSession(false)) {
        return getMapper(session).findUsersForNotification(NOTIFICATION_PREFIX + notificationDispatcherKey + "." + notificationChannelKey, projectKey);
      }
    }