CCalendarSync::getAttendeesCodesForCut

static function getAttendeesCodesForCut($attendeesCodes): ?array
{
	if (is_array($attendeesCodes))
	{
		return $attendeesCodes;
	}

	if (is_string($attendeesCodes) && $res = explode(',', $attendeesCodes))
	{
		return $res;
	}

	return null;
}