payment_method_basic_card library Null safety

Payment Method: Basic Card

https://w3c.github.io/payment-method-basic-card/

Classes

BasicCardChangeDetails
BasicCardErrors
BasicCardRequest
Secure contextThis feature is available only in secure contexts (HTTPS), in some or all supporting browsers. [...]
BasicCardResponse
Secure contextThis feature is available only in secure contexts (HTTPS), in some or all supporting browsers. Experimental This is an experimental technologyCheck the Browser compatibility table carefully before using this in production. The dictionary (related to the Payment Request API, although defined in the Basic Card Payment spec) defines an object structure for payment response details such as the number/expiry date of the card used to make the payment, and the billing address.