public function addTab($name, $title)
    {
        if ($title instanceof \MUtil_Html_HtmlInterface) {
            $title = $title->render($this->getView());
        }
        $tab = new \Gems_Form_TabSubForm(array('name' => $name, 'title' => strip_tags($title)));
        $this->currentTab = $tab;
        $this->addSubForm($tab, $name);
        return $tab;
    }