Write multiple sitemaps from a single crawl

[code23-isaac]

Hi,

I'm trying to create sitemaps for different content on my site, i.e. blog posts, blog categories, products, product categories, etc… I can achieve the specific content types using hasCrawled(), for instance product categories:

->hasCrawled(function (Url $url) {
                if(
                    count($url->segments()) >= 2 &&
                    $url->segments()[0] === 'category'
                ) return $url;

                return;
            })

The problem is I can't now access the original crawl data. If I write the above to file like:

->writeToFile('product_categories_sitemap.xml');

The next sitemap I export also has the categories in it.

Is there a way to crawl the site once and write multiple different sitemaps from that, based on url conditions?

Thanks