list as $header => $content) {
            $list[] = '' . e($header) . ' ' . e($content);
        }
        return implode("
\n", $list);
    }
    public function __toString(): string
    {
        $list = [];
        foreach ($this->list as $header => $content) {
            $list[] = $header . ' ' . $content;
        }
        return implode("\n", $list);
    }
}