public function selectSubjects()
    {
        $this->defaultData();

        $memberProperty = $this->getProperty(GroupsService::PROPERTY_MEMBERS_URI);
        $memberForm = tao_helpers_form_GenerisTreeForm::buildTree($this->getCurrentInstance(), $memberProperty);
        $memberForm->setData('title', __('Select group test takers'));
        $this->setData('tree', $memberForm->render());
        $this->setView('sas' . DIRECTORY_SEPARATOR . 'generisTreeSelect.tpl', 'tao');
    }