ApiPlatform\Core\Serializer\AbstractItemNormalizer::denormalize PHP Method

    public function denormalize($data, $class, $format = null, array $context = [])
    {
        $context['api_denormalize'] = true;
        if (!isset($context['resource_class'])) {
            $context['resource_class'] = $class;
        }
        return parent::denormalize($data, $class, $format, $context);
    }

 /**
  * {@inheritdoc}
  *
  * @throws InvalidArgumentException
  */
 public function denormalize($data, $class, $format = null, array $context = [])
 {
     // Avoid issues with proxies if we populated the object
     if (isset($data['id']) && !isset($context['object_to_populate'])) {
         if (isset($context['api_allow_update']) && true !== $context['api_allow_update']) {
             throw new InvalidArgumentException('Update is not allowed for this operation.');
         }
         $context['object_to_populate'] = $this->iriConverter->getItemFromIri($data['id'], $context + ['fetch_data' => false]);
     }
     return parent::denormalize($data, $class, $format, $context);
 }