// @dart = 2.9
class B extends Object with M1, M2 {
  B(value);
}

abstract class M1 {
  m() => print("M1");
}

abstract class M2 {
  m() => print("M2");
}

class C extends Object with M1, M2 {
  C(value);
}

abstract class G1<T> {
  m() => print(T);
}

class D<S> extends Object with G1<S> {}

main() {}