public function getParentZoneAtSamePositionIfExists(ContentSet $contentSet)
    {
        $indexOfContent = $this->getContentSet()->indexOfByUid($contentSet, true);
        if (false === $indexOfContent) {
            return false;
        }

        $parent = $this->getParent();
        if (null === $parent) {
            return false;
        }

        $parentContentSet = $parent->getContentSet()->item($indexOfContent);
        if ($parentContentSet) {
            return $parentContentSet;
        }

        return false;
    }