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handleCircularReference example

class JsonSerializableNormalizer extends AbstractNormalizer
{
    public function normalize(mixed $object, string $format = null, array $context = []): array|string|int|float|bool|\ArrayObject|null
    {
        if ($this->isCircularReference($object, $context)) {
            return $this->handleCircularReference($object, $format, $context);
        }

        if (!$object instanceof \JsonSerializable) {
            throw new InvalidArgumentException(sprintf('The object must implement "%s".', \JsonSerializable::class));
        }

        if (!$this->serializer instanceof NormalizerInterface) {
            throw new LogicException('Cannot normalize object because injected serializer is not a normalizer.');
        }

        return $this->serializer->normalize($object->jsonSerialize(), $format, $context);
    }

    public function normalize(mixed $object, string $format = null, array $context = [])
    {
        if (!isset($context['cache_key'])) {
            $context['cache_key'] = $this->getCacheKey($format, $context);
        }

        $this->validateCallbackContext($context);

        if ($this->isCircularReference($object, $context)) {
            return $this->handleCircularReference($object, $format, $context);
        }

        $data = [];
        $stack = [];
        $attributes = $this->getAttributes($object, $format, $context);
        $class = ($this->objectClassResolver)($object);
        $classMetadata = $this->classMetadataFactory?->getMetadataFor($class);
        $attributesMetadata = $this->classMetadataFactory?->getMetadataFor($class)->getAttributesMetadata();
        if (isset($context[self::MAX_DEPTH_HANDLER])) {
            $maxDepthHandler = $context[self::MAX_DEPTH_HANDLER];
            if (!\is_callable($maxDepthHandler)) {