icingaweb2/application/controllers/LayoutController.php

<?php

// SPDX-FileCopyrightText: 2018 Icinga GmbH <https://icinga.com>
// SPDX-License-Identifier: GPL-3.0-or-later

namespace Icinga\Controllers;

use Icinga\Web\Controller\ActionController;
use Icinga\Web\Menu;

/**
 * Create complex layout parts
 */
class LayoutController extends ActionController
{
    /**
     * Render the menu
     */
    public function menuAction()
    {
        $this->setAutorefreshInterval(15);
        $this->_helper->layout()->disableLayout();
        $this->view->menuRenderer = (new Menu())->getRenderer();
    }

    public function announcementsAction()
    {
        $this->_helper->layout()->disableLayout();
    }
}