public static function statefulFormTb(
        $layout = self::FORM_LAYOUT_VERTICAL,
        $action = '',
        $method = 'post',
        $htmlOptions = array()
    ) {
        return self::formTb($layout, $action, $method, $htmlOptions)
        . self::tag('div', array('style' => 'display: none'), parent::pageStateField(''));
    }