wp-includes/sitemaps
- wp-includes/sitemaps/class-wp-sitemaps-registry.php
- wp-includes/sitemaps/class-wp-sitemaps-renderer.php
- wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php
- wp-includes/sitemaps/class-wp-sitemaps.php
- wp-includes/sitemaps/providers
- wp-includes/sitemaps/class-wp-sitemaps-index.php
- wp-includes/sitemaps/class-wp-sitemaps-provider.php