pkg/front_end/testcases/extension_types/issue53720_2.dart.textual_outline.expect

extension type E1(int i) {
  set m1(_) {}
  void m2() {}
  get m3 => 1;
  set m4(_) {}
}

extension type E2(int i) implements E1 {
  void m1() {}
  set m2(_) {}
  set m3(_) {}
  get m4 => 1;
}

void test() {}