public function getFolderCreateForm($parentId = 0)
    {
        /** @var FolderCreateFormFactory $factory */
        $factory = Injector::inst()->get(FolderCreateFormFactory::class);
        $form = $factory->getForm($this, 'folderCreateForm', [ 'ParentID' => $parentId ]);

        // Set form action handler with ParentID included
        $form->setRequestHandler(
            LeftAndMainFormRequestHandler::create($form, [ $parentId ])
        );

        return $form;
    }