public function listAction(Request $request = null)
    {
        $this->admin->checkAccess('list');

        if ($listMode = $request->get('_list_mode')) {
            $this->admin->setListMode($listMode);
        }

        $datagrid = $this->admin->getDatagrid();
        $datagrid->setValue('context', null, $this->admin->getPersistentParameter('context'));

        $formView = $datagrid->getForm()->createView();

        // set the theme for the current Admin Form
        $this->setFormTheme($formView, $this->admin->getFilterTheme());

        return $this->render($this->admin->getTemplate('list'), [
            'action' => 'list',
            'form' => $formView,
            'datagrid' => $datagrid,
            'csrf_token' => $this->getCsrfToken('sonata.batch'),
        ]);
    }