class Foo {
  inFoo() {
    print("in foo");
  }
}

class Bar < Foo {
  inBar() {
    print("in bar");
  }
}

class Baz < Bar {
  inBaz() {
    print("in baz");
  }
}

var baz = Baz();
baz.inFoo(); # expect: in foo
baz.inBar(); # expect: in bar
baz.inBaz(); # expect: in baz