public function recreateInstances($project, $region, $instanceGroupManager, Google_Service_Compute_RegionInstanceGroupManagersRecreateRequest $postBody, $optParams = array())
  {
    $params = array('project' => $project, 'region' => $region, 'instanceGroupManager' => $instanceGroupManager, 'postBody' => $postBody);
    $params = array_merge($params, $optParams);
    return $this->call('recreateInstances', array($params), "Google_Service_Compute_Operation");
  }