pkg/front_end/testcases/general/abstract_overrides_concrete.dart.textual_outline_modelled.expect

// @dart = 2.9
abstract class B extends A {
  void foo([a]);
}

abstract class E extends A implements I {}

abstract class I {
  void foo([a]);
}

class A {
  void foo() {}
}

class C extends B {}

class D extends A implements I {}

class F extends E {}

main() {}