How is the «Go to Review Your Order» button implemented on the «multishipping/checkout/billing» page?

Context: How is the multishipping multishipping/checkout/billingBilling Information», payment methods) page implemented?

1. Magento_Multishipping::checkout/billing.phtml

2. Magento_Multishipping/js/payment::options()

3. Magento_Multishipping/js/payment::_create()

4. Magento_Multishipping/js/payment::_submitHandler()

5. Magento_Multishipping/js/payment::_validatePaymentMethod()

6. Magento_Multishipping::checkout/billing.phtml - the form’s action

7. Magento\Multishipping\Block\Checkout\Billing::getPostActionUrl()

8. Magento\Multishipping\Controller\Checkout\Overview::execute()

9. Magento\Multishipping\Model\Checkout\Type\Multishipping::setPaymentMethod()

10. Magento\Quote\Model\Quote\Payment::importData()

11. Magento\Quote\Model\Quote\Payment::convertPaymentData()

See also: