getDefaultSalutationId example

$data->set('vatIds', null);
        }

        /** @var ?RequestDataBag $vatIds */
        $vatIds = $data->get('vatIds');
        if ($vatIds) {
            $vatIds = \array_filter($vatIds->all());
            $data->set('vatIds', empty($vatIds) ? null : $vatIds);
        }

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

        $this->dispatchValidationEvent($validation, $data, $context->getContext());

        $this->validator->validate($data->all(), $validation);

        $customerData = $data->only('firstName', 'lastName', 'salutationId', 'title', 'company', 'accountType');

        if ($vatIds) {
            $customerData['vatIds'] = $data->get('vatIds');
        }

        

$isGuest = $data->getBoolean('guest');

        if (!$data->has('billingAddress')) {
            $data->set('billingAddress', new RequestDataBag());
        }

        if ($data->has('accountType') && empty($data->get('accountType'))) {
            $data->remove('accountType');
        }

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

        $this->validateRegistrationData($data, $isGuest, $context, $additionalValidationDefinitions, $validateStorefrontUrl);

        $customer = $this->mapCustomerData($data, $isGuest, $context);

        /** @var DataBag $billing */
        $billing = $data->get('billingAddress');

        if ($data->has('title')) {
            $billing->set('title', $data->get('title'));
        }

    public function upsert(?string $addressId, RequestDataBag $data, SalesChannelContext $context, CustomerEntity $customer): UpsertAddressRouteResponse
    {
        if (!$addressId) {
            $isCreate = true;
            $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'),