$container->set(
    'dispatcher',
    function () {
        $eventsManager = new Manager();

        $eventsManager->attach(
            'dispatch:beforeExecuteRoute',
            new SecurityPlugin()
        );

        $eventsManager->attach(
            'dispatch:beforeException',
            new NotFoundPlugin()
        );

        $containerspatcher = new Dispatcher();

        $containerspatcher->setEventsManager($eventsManager);

        return $containerspatcher;
    }
);

class SecurityPlugin extends Injectable
{
    public function beforeExecuteRoute(
        Event $event, 
        Dispatcher $containerspatcher
    ) {
        return false;
    }
}

class NotFoundPlugin extends Injectable
{
    public function beforeExecuteRoute(
        Event $event, 
        Dispatcher $containerspatcher
    ) {
        // different than false
        return true;
    }
}