LdapTools\AttributeConverter\ConvertPrimaryGroup::fromLdap PHP Метод

    public function fromLdap($value)
    {
        if (!$this->getLdapConnection()) {
            return $value;
        }
        /**
         * This is a rather expensive operation just to get a group name that will probably either always be the same
         * for all users in a domain or is very, very unlikely to ever change. Perhaps find a way to cache this or speed
         * it up?
         */
        $userSid = $this->getCurrentLdapAttributeValue('objectSid');
        $groupSid = preg_replace('/\\d+$/', $value, (new ConvertWindowsSid())->fromLdap($userSid));
        return (new LdapQueryBuilder($this->getLdapConnection()))->select('cn')->where(['objectSid' => (new ConvertWindowsSid())->setOperationType(self::TYPE_SEARCH_TO)->toLdap($groupSid)])->getLdapQuery()->getSingleScalarResult();
    }