Final Class Yiisoft\Queue\Message\JsonMessageSerializer

                public function serialize(MessageInterface $message): string
{
    $payload = [
        'type' => $message->getType(),
        'data' => $message->getData(),
        'meta' => $message->getMetadata(),
    ];
    if (!isset($payload['meta']['message-class'])) {
        $payload['meta']['message-class'] = $message instanceof Envelope
            ? $message->getMessage()::class
            : $message::class;
    }
    return json_encode($payload, JSON_THROW_ON_ERROR);
}

            

                public function unserialize(string $value): MessageInterface
{
    $payload = json_decode($value, true, 512, JSON_THROW_ON_ERROR);
    if (!is_array($payload)) {
        throw new InvalidArgumentException('Payload must be array. Got ' . get_debug_type($payload) . '.');
    }
    $type = $payload['type'] ?? null;
    if (!isset($type) || !is_string($type)) {
        throw new InvalidArgumentException('Message type must be a string. Got ' . get_debug_type($type) . '.');
    }
    $meta = $payload['meta'] ?? [];
    if (!is_array($meta)) {
        throw new InvalidArgumentException('Metadata must be an array. Got ' . get_debug_type($meta) . '.');
    }
    $class = $meta['message-class'] ?? GenericMessage::class;
    // Don't check subclasses when it's a default class: that's faster
    if ($class !== GenericMessage::class && !is_subclass_of($class, MessageInterface::class)) {
        $class = GenericMessage::class;
    }
    /**
     * @var class-string<MessageInterface> $class
     */
    return $class::fromData($type, $payload['data'] ?? null)->withMetadata($meta);
}