Apparently illogical query in xmlsitemap_xmlsitemap_index_links()

The xmlsitemap_xmlsitemap_index_links($limit) function seems to be querying for something which is not exactly what it needs: within the internal loop, one finds:

      if ($entity_type->get('type')) {
        $query->condition('type', $entity_bundles, 'IN');
      }

And this always fails from what I've seen. It seems that the purpose is to filter the indexing by limiting it to only the selected bundles, calculated a bit higher in the code and set in $entity_bundles. Which makes me think this is an attempt to limit the query to node bundles, by (incorrectly) using hardcoded knowledge of the Node bundle key being called type, but which should more generally use the bundle key mapping, like:

      if ($entity_type->hasKey('bundle')) {
        $bundleKey = $entity_type->getKey('bundle');
        $query->condition($bundleKey, $entity_bundles, 'IN');
      }