class BasePresenter {

    /**
     * @return Fb\FacebookControl
     */
    protected function createComponentFacebook()
    {
        $fb = new Fb\FacebookControl($this->facebook, $this->context->cacheStorage);
        $fb->on['login']['response'][] = function (Fb\Dialog\LoginDialog $dialog) {
            $me = $dialog->facebook->api('/me');
            $dialog->presenter->flashMessage("Nice to meet you, " . $me['first_name'] . '!');
        };
        return $fb;
    }




class ConcretePresenter {

    /**
     * @return Kdyby\Facebook\FacebookControl
     */
    protected function createComponentFacebook()
    {
        $fb = parent::createComponentFacebook();
        $fb->on['login']['response'][] = $this->fillProfilesFromFacebook;
        return $fb;
    }