addList example

->add('referencedId', new Type('string'))
            ->add('coverId', new Type('string'), new EntityExists(['entity' => MediaDefinition::ENTITY_NAME, 'context' => Context::createDefaultContext()]))
            ->addSub(
                'priceDefinition',
                (new DataValidationDefinition())
                    ->add('type', new Type('string'))
                    ->add('price', new Type('numeric'))
                    ->add('percentage', new Type('numeric'))
                    ->add('quantity', new Type('int'))
                    ->add('isCalculated', new Type('bool'))
                    ->add('listPrice', new Type('numeric'))
                    ->addList(
                        'taxRules',
                        (new DataValidationDefinition())
                            ->add('taxRate', new Type('numeric'))
                            ->add('percentage', new Type('numeric'))
                    )
            );
    }
}

    public function createDocuments(Request $request, string $documentTypeName, Context $context): JsonResponse
    {
        $documents = $this->serializer->decode($request->getContent(), 'json');

        if (empty($documents) || !\is_array($documents)) {
            throw RoutingException::invalidRequestParameter('Request parameters must be an array of documents object');
        }

        $operations = [];

        $definition = new DataValidationDefinition();
        $definition->addList(
            'documents',
            (new DataValidationDefinition())
                ->add('orderId', new NotBlank())
                ->add('fileType', new Choice([FileTypes::PDF]))
                ->add('config', new Type('array'))
                ->add('static', new Type('bool'))
                ->add('referencedDocumentId', new Uuid())
        );

        $this->dataValidator->validate($documents, $definition);