public function create($studentId, Google_Service_Classroom_GuardianInvitation $postBody, $optParams = array())
  {
    $params = array('studentId' => $studentId, 'postBody' => $postBody);
    $params = array_merge($params, $optParams);
    return $this->call('create', array($params), "Google_Service_Classroom_GuardianInvitation");
  }