wp-includes/sitemaps/class-wp-sitemaps-index.php:44WP_Sitemaps_Index constructor.
$registryWP_Sitemaps_Registry public function __construct( WP_Sitemaps_Registry $registry ) { $this->registry = $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-index.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.