public function add($title, $url = null, array $options = [])
    {
        if (is_array($title)) {
            foreach ($title as $crumb) {
                $this->crumbs[] = $crumb + ['title' => '', 'url' => null, 'options' => []];
            }

            return $this;
        }

        $this->crumbs[] = compact('title', 'url', 'options');

        return $this;
    }