class A {
  method() {
    print "A method";
  }
}

class B < A {
  method() {
    print "B method";
  }

  test() {
    super.method();
  }
}

class C < B {}

C().test();

// ==================================================

class Doughnut {
  cook() {
    print "Dunk in the fryer.";
    this.finish("sprinkles");
  }

  finish(ingredient) {
    print "Finish with " + ingredient;
  }
}

class Cruller < Doughnut {
  finish(ingredient) {
    // No sprinkles, always icing.
    super.finish("icing");
  }
}