/**
* Send a test newsletter campaign.
*
* @param string $campaignId
* @param string|array $emails
* @param string $sendType
*
* @return mixed
*/
public function sendTestCampaign($campaignId, $emails, $sendType = '')
{
if (!is_array($emails)) {
$emails = [$emails];
}
return $this->campaign->sendTest($campaignId, $emails, $sendType);
}
