Neos\Neos\Controller\LoginController::logoutAction PHP Method

    public function logoutAction()
    {
        $possibleRedirectionUri = $this->backendRedirectionService->getAfterLogoutRedirectionUri($this->request);
        parent::logoutAction();
        switch ($this->request->getFormat()) {
            case 'json':
                $this->view->assign('value', array('success' => true));
                break;
            default:
                if ($possibleRedirectionUri !== null) {
                    $this->redirectToUri($possibleRedirectionUri);
                }
                $this->addFlashMessage('Successfully logged out', 'Logged out', Message::SEVERITY_NOTICE, array(), 1318421560);
                $this->redirect('index');
        }
    }