public function updateLanguage($userId, Google_Service_Gmail_LanguageSettings $postBody, $optParams = array())
  {
    $params = array('userId' => $userId, 'postBody' => $postBody);
    $params = array_merge($params, $optParams);
    return $this->call('updateLanguage', array($params), "Google_Service_Gmail_LanguageSettings");
  }