getCustomerAddress example

        $customer = new CustomerEntity();
        $customer->setId('customer-id');
        $customer->setEmail('customer-email');
        $customer->setSalutationId('customer-salutation-id');
        $customer->setFirstName('customer-first-name');
        $customer->setLastName('customer-last-name');
        $customer->setCustomerNumber('customer-number');
        $customer->setGroupId('customer-group-id');

        if (!$withoutBillingAddress) {
            $customer->setDefaultBillingAddress($this->getCustomerAddress());
        }

        return $customer;
    }

    private function getCustomerAddress(): CustomerAddressEntity
    {
        $address = new CustomerAddressEntity();
        $address->setId('billing-address-id');
        $address->setSalutationId('billing-address-salutation-id');
        $address->setFirstName('billing-address-first-name');