LdapTools\Object\LdapObjectManager::getObjectRestoreLocation PHP Method

    protected function getObjectRestoreLocation(LdapObject $ldapObject, $location)
    {
        // If a location was defined, use that.
        if ($location) {
            $newLocation = $location;
            // Check the attribute for the last known location first...
        } elseif ($ldapObject->has('lastKnownLocation')) {
            $newLocation = $ldapObject->get('lastKnownLocation');
            // All else failed, so query it from the DN...
        } else {
            try {
                $newLocation = (new LdapQueryBuilder($this->connection, $this->schemaFactory))->select('lastKnownParent')->from(LdapObjectType::DELETED)->where(['dn' => $ldapObject->get('dn')])->getLdapQuery()->getSingleScalarOrNullResult();
            } catch (Exception $e) {
                $newLocation = null;
            }
        }
        // Either this was not a deleted object or it no longer exists?
        if (is_null($newLocation)) {
            throw new InvalidArgumentException(sprintf('No restore location specified and cannot find the last known location for "%s".', $ldapObject->get('dn')));
        }
        return $newLocation;
    }