protected function label(Parameter $item)
    {
        $name = $item->name();

        if ($item instanceof Option) {
            $name = $item->short() . '|' . $item->long();
        }

        $variad = $item->variadic() ? '...' : '';

        if ($item->required()) {
            return "<$name$variad>";
        }

        return "[$name$variad]";
    }