EventCloner::getRecurringRule

protected function getRecurringRule(): ?RecurringEventRules
{
	if ($this->originalEvent->getRecurringRule())
	{
		$result = clone $this->originalEvent->getRecurringRule();
		if ($result->hasUntil())
		{
			$result->setUntil($this->cloneDate($result->getUntil()));
		}

		return $result;
	}

	return null;
}