wp-includes/user.php:3068The old private function for setting up user contact methods.
$userWP_User|nulloptionalnullstring[]function _wp_get_user_contactmethods( $user = null ) { return wp_get_user_contact_methods( $user );}Introduced in 2.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/user.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.