protected function callSendMessage($userIds, $emails, array $data)
{
$userIds = is_array($userIds) ? $userIds : [$userIds];
$emails = is_array($emails) ? $emails : [$emails];
$this->guardAgainstEmptyData($userIds, $emails);
$requestOptions = array_merge(['emails' => $emails, 'user_ids' => $userIds], $data);
return $this->execPostRequest($requestOptions, UrlBuilder::RESOURCE_SEND_MESSAGE);
}