protected function breadcrumbs($folder)
    {
        $folder = trim($folder, '/');
        $folders = collect(explode('/', $folder));
        $path = '';

        return $folders->reduce(function ($crumbs, $folder) use (&$path) {
            $path .= '/'.$folder;
            $crumbs[$path] = $folder;

            return $crumbs;
        }, collect())->prepend($this->breadcrumbRootLabel, '/');
    }