Overrides Drupal\views\Plugin\views\display\DisplayPluginBase::execute().
Overrides DisplayPluginBase::execute
public function execute() {
$this->view
->build();
$render = $this->view
->render();
// Render the test option as the title before the view output.
$render['#prefix'] = '<h1>' . filter_xss_admin($this->options['test_option']) . '</h1>';
return $render;
}