Mail::getNotificationIdsToSend

public function getNotificationIdsToSend(?int $limit = null): array
{
	$lastSend = (int)Option::get(static::MODULE_ID, self::LAST_SEND_NOTIFICATION, 0);

	return $this->getMessageIdsToSendByType(IM_MESSAGE_SYSTEM, $lastSend, $limit);
}