protected function _showUntranslated($str = '', array $args = null)
    {
        $arguments = '';
        if (!empty($args)) {
            foreach ($args as $var=>$val) {
                $arguments .= '"'.$var.'" => '.str_replace(array("\n", "\t"), '', var_export($val, 1)).', ';
            }
        }
        return sprintf($this->getLoader()->getOption('show_untranslated_wrapper', '%s'), $str, $arguments);
    }