public function getChildren($regionId, $params = array())
    {
        $resource = 'georegion/' . $regionId . '/children.json';
        $resource .= '?' . $this->buildQueryString($params);
        $response = $this->getServiceResponse($resource);

        $geoRegionChildren = new Models\ResponseGeoRegionChildrenGet($response);

        return $geoRegionChildren;
    }