private function log(string $msg, null|array|object|string $optional = null): void
    {
        if ($optional) {
            if (is_array($optional) || is_object($optional)) {
                $optional = json_encode($optional);
            }
            $msg .= ' | ' . $optional;
        }

        file_put_contents('/tmp/fixer-debug.log', date('[c] ') . $msg . "\n", FILE_APPEND);
    }