wp-includes/sitemaps/class-wp-sitemaps.php:51WP_Sitemaps constructor.
public function __construct() { $this->registry = new WP_Sitemaps_Registry(); $this->renderer = new WP_Sitemaps_Renderer(); $this->index = new WP_Sitemaps_Index( $this->registry ); }Introduced in 5.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/sitemaps/class-wp-sitemaps.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.