$classes ]; $stage = isset($params['OnLive']) ? Versioned::LIVE : Versioned::DRAFT; return Versioned::get_by_stage(SiteTree::class, $stage, $classFilter); } public function columns() { return [ "Title" => [ "title" => "Title", // todo: use NestedTitle(2) "link" => true, ], ]; } public function getParameterFields() { return new FieldList( new CheckboxField('OnLive', _t(__CLASS__.'.ParameterLiveCheckbox', 'Check live site')) ); } }