this will be used in `ApplePayPaymentHandler::didChangePaymentMethodMode` and is primarily for code cleanliness :)
<rdar://problem/78134060>
Created attachment 428906 [details] Patch
Committed r277739 (237911@main): <https://commits.webkit.org/237911@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428906 [details].