wp-includes/class-wp-rewrite.php:2022Constructor - Calls init(), which runs setup.
public function __construct() { $this->init(); }Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-rewrite.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.