How is Magento\Braintree\Gateway\Response\PaymentDetailsHandler implemented and used?

Implementation

Usages

Context: How is Magento\Payment\Gateway\Response\HandlerChain::handle() implemented and used?

1. BraintreeAuthorizationHandler

2. BraintreeVaultResponseHandler

3. BraintreePayPalResponseHandler

4. BraintreePayPalVaultResponseHandler