class BaseFrontendController extends BaseController {

public function initialize()
{
    parent::initialize()
    if ( $this->authenticated ) {
        $this->view->setTemplateBefore('frontend-authenticated');
    } else {
        $this->view->setTemplateBefore('frontend-guest');
    }
}

class IndexController extends BaseFrontendController {

public function initialize()
{
    parent::initialize()
}
}