[
        // put any GuzzleHttp options here
    ]
];
try {
    $parser = new SitemapParser('MyCustomUserAgent', $config);
    $parser->addToQueue(['https://www.google.com/robots.txt']);
    while (count($queue = $parser->getQueue()) > 0) {
        // Loop through each sitemap individually
        echo '
Parsing sitemap: ' . $queue[0] . '
';
        $parser->parse($queue[0]);
        foreach ($parser->getSitemaps() as $url => $tags) {
            echo 'Sitemap
';
            echo 'URL: ' . $url . '
';
            echo 'LastMod: ' . $tags['lastmod'] . '
';
            echo '
';
        }
        foreach ($parser->getURLs() as $url => $tags) {
            echo 'URL: ' . $url . '
';
            echo 'LastMod: ' . $tags['lastmod'] . '
';
            echo 'ChangeFreq: ' . $tags['changefreq'] . '
';
            echo 'Priority: ' . $tags['priority'] . '
';
            echo '
';
        }
    }
} catch (SitemapParserException $e) {
    echo $e->getMessage();
}