}

    default String getLdapGroupFilter() {
        return getSystemProperty(Constants.LDAP_GROUP_FILTER, StringUtil.EMPTY);
    }

    default void setNotificationLogin(final String value) {
        setSystemProperty(Constants.NOTIFICATION_LOGIN, value);
    }

    default String getNotificationLogin() {

        fessConfig.setLdapInitialContextFactory(form.ldapInitialContextFactory != null ? form.ldapInitialContextFactory : StringUtil.EMPTY);
        fessConfig.setNotificationLogin(form.notificationLogin);
        fessConfig.setNotificationSearchTop(form.notificationSearchTop);
        fessConfig.setNotificationAdvanceSearch(form.notificationAdvanceSearch);