AddressValidationError example

$validation = $this->addressValidationFactory->create($context);
        $validationEvent = new BuildValidationEvent($validation, new DataBag(), $context->getContext());
        $this->eventDispatcher->dispatch($validationEvent);

        if ($billingAddress === null) {
            return;
        }

        $violations = $this->validator->getViolations($billingAddress->jsonSerialize(), $validation);

        if ($violations->count() > 0) {
            $cart->getErrors()->add(new AddressValidationError(true, $violations));
        }
    }

    private function validateShippingAddress(
        ?CustomerAddressEntity $shippingAddress,
        ?CustomerAddressEntity $billingAddress,
        Cart $cart,
        SalesChannelContext $context
    ): void {
        $validation = $this->addressValidationFactory->create($context);
        $validationEvent = new BuildValidationEvent($validation, new DataBag(), $context->getContext());