protected function _render()
    {
        try {
            $template = $this->_getTemplate();
            $context  = $this->_getContextFor($template);

            return $this->_renderTemplate($template, $context);
        } catch (RootException $e) {
            throw $this->_throwCouldNotRenderException($this->__('Could not render template'), null, $e);
        }
    }