builder property

(Widget Function(List<PaymentMethod> methods, LoadingState state, Future<PaymentResponse> submit(PaymentMethod method))?) builder

user this to build your own ui and then at the end call submit submit method is future so you can wait it the default is ListView

Implementation

final Widget Function(List<PaymentMethod> methods, LoadingState state,
    Future<PaymentResponse> Function(PaymentMethod method) submit)? builder;