EventDescription::addAttendeesInfo

private function addAttendeesInfo(?string $description, Event $event, string $languageId): string
{
	if (!$description)
	{
		$description = '';
	}

	if (
		$event->getAttendeesCollection()
		&& ($attendees = $event->getAttendeesCollection()->getAttendeesCodes())
		&& count($attendees) > 1
	)
	{
		$description = (new AttendeesDescription($languageId))
			->addAttendeesToDescription($attendees, $description, $event->getParentId())
		;
	}

	return $description;
}