wp-includes/class-walker-nav-menu.php:55Constructor.
public function __construct() { $this->privacy_policy_url = get_privacy_policy_url(); }Introduced in 6.8.0. Unchanged from 6.8.8 through 7.1.0.
Signature, return type and hooks compared across 4 parsed releases.
src/wp-includes/class-walker-nav-menu.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.