silverstripe / silverstripe-activedirectory

        if (!$results || !$cached) {

            $results = [];

            foreach ($searchLocations as $searchLocation) {

                $records = $this->gateway->getGroups($searchLocation, Ldap::SEARCH_SCOPE_SUB, $attributes);

                if (!$records) {

                    continue;

                }

                foreach ($records as $record) {

                    $results[$record[$indexBy]] = $record;

                }

            }

            $cache->save($results);

        }

        $searchLocations = $this->config()->groups_search_locations ?: [null];

        $results = [];

        foreach ($searchLocations as $searchLocation) {

            $records = $this->gateway->getNestedGroups($dn, $searchLocation, Ldap::SEARCH_SCOPE_SUB, $attributes);

            foreach ($records as $record) {

                $results[$record['dn']] = $record;

            }

        }

        self::$_cache_nested_groups[$dn] = $results;

        return $results;

        $searchLocations = $this->config()->users_search_locations ?: [null];

        $results = [];

        foreach ($searchLocations as $searchLocation) {

            $records = $this->gateway->getUsers($searchLocation, Ldap::SEARCH_SCOPE_SUB, $attributes);

            if (!$records) {

                continue;

            }

            foreach ($records as $record) {

                $results[$record['objectguid']] = $record;

            }

        }

        return $results;

    }