$lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
} elseif (isset($component->DURATION)) {
$endDate = clone $component->DTSTART->getDateTime();
$lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
} elseif (isset($component->DURATION)) {
$endDate = clone $component->DTSTART->getDateTime();