private function FindParentRights()
    {
        $parentRights = null;
        $parentContent = $this->Content()->Exists() ? ContentTreeUtil::ParentOf($this->Content()) : null;
        if ($parentContent) {
            $parentRights = RightsFinder::FindContentRights($parentContent);
        }
        if (!$parentRights) {
            switch ($this->Location()) {
                case Enums\ContentLocation::Page():
                    $pageRights = RightsFinder::FindPageRights($this->Page());
                    $parentRights = $pageRights ? $pageRights->GetContentRights() : null;
                    break;

                case Enums\ContentLocation::Layout():
                    $layoutRights = $this->Area()->GetLayout()->GetUserGroupRights();
                    $parentRights = $layoutRights ? $layoutRights->GetContentRights() : null;
                    break;

                case Enums\ContentLocation::Container():
                    $containerRights = $this->Container()->GetUserGroupRights();
                    $parentRights = $containerRights ? $containerRights->GetContentRights() : null;
                    break;
            }
        }
        return $parentRights;
    }