getValidationDefinition example

$addressId = Uuid::randomHex();
        } else {
            $this->validateAddress($addressId, $context, $customer);
            $isCreate = false;
        }

        if (!$data->get('salutationId')) {
            $data->set('salutationId', $this->getDefaultSalutationId($context));
        }

        $accountType = $data->get('accountType', CustomerEntity::ACCOUNT_TYPE_PRIVATE);
        $definition = $this->getValidationDefinition($data, $accountType, $isCreate, $context);
        $this->validator->validate(array_merge(['id' => $addressId], $data->all()), $definition);

        $addressData = [
            'salutationId' => $data->get('salutationId'),
            'firstName' => $data->get('firstName'),
            'lastName' => $data->get('lastName'),
            'street' => $data->get('street'),
            'city' => $data->get('city'),
            'zipcode' => $data->get('zipcode'),
            'countryId' => $data->get('countryId'),
            'countryStateId' => $data->get('countryStateId') ?: null,
            

public function send(array $data, Context $context, array $templateData = []): ?Email
    {
        $event = new MailBeforeValidateEvent($data, $context, $templateData);
        $this->eventDispatcher->dispatch($event);
        $data = $event->getData();
        $templateData = $event->getTemplateData();

        if ($event->isPropagationStopped()) {
            return null;
        }

        $definition = $this->getValidationDefinition($context);
        $this->dataValidator->validate($data, $definition);

        $recipients = $data['recipients'];
        $salesChannelId = $data['salesChannelId'];
        $salesChannel = null;

        if (($salesChannelId !== null && !isset($templateData['salesChannel'])) || $this->isTestMode($data)) {
            $criteria = $this->getSalesChannelDomainCriteria($salesChannelId, $context);

            /** @var SalesChannelEntity|null $salesChannel */
            $salesChannel = $this->salesChannelRepository->search($criteria, $context)->get($salesChannelId);