SyncEvent::addExcludeDate

private function addExcludeDate(CoreBaseDate $newExDate)
{
	/** @var CoreBaseDate $exDate */
	foreach ($this->event->getExcludedDateCollection() as $exDate)
	{
		if ($exDate->format('Ymd') === $newExDate->format('Ymd'))
		{
			return;
		}
	}

	$this->event->getExcludedDateCollection()->add($newExDate);
}