public function duplicateSubsiteRelations($originalPage)
    {
        $thisClass = $originalPage->ClassName;
        $relations = Config::inst()->get($thisClass, 'duplicate_to_subsite_relations');

        if ($relations && !empty($relations)) {
            foreach ($relations as $relation) {
                $items = $originalPage->$relation();
                foreach ($items as $item) {
                    $duplicateItem = $item->duplicate(false);
                    $duplicateItem->{$thisClass.'ID'} = $this->owner->ID;
                    $duplicateItem->write();
                }
            }
        }
    }