wp-includes/SimplePie/src/Misc.php:376$datastring$inputstring$outputstringstring|false protected static function change_encoding_uconverter(string $data, string $input, string $output) { return @\UConverter::transcode($data, $output, $input); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/SimplePie/src/Misc.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.