wp-admin/includes/ms-deprecated.php:46WPMU options.
$optionsfunction mu_options( $options ) { _deprecated_function( __FUNCTION__, '3.0.0' ); return $options;}Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/ms-deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.