wp-includes/SimplePie/src/Cache.php:87Register a handler
$typestring$classSimplePie\class-string<Base>void public static function register(string $type, $class) { self::$handlers[$type] = $class; }One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
none to void.verified against sourcesrc/wp-includes/SimplePie/src/Cache.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.