pkg/front_end/testcases/patterns/extension_access.dart.textual_outline_modelled.expect

class A implements I {}

class I {}

expect(expected, actual) {}

extension on A {
  int get member => 87;
}

extension on I {
  int get member => 42;
}

main() {}

method(A a) => switch (a) {
      I(:var member) => member,
    };