class Base {
  __init__(a, b) {
    print("Base.__init__(" + a + ", " + b + ")");
  }
}

class Derived < Base {
  __init__() {
    print("Derived.__init__()");
    super.__init__("a", "b");
  }
}

Derived();
# expect: Derived.__init__()
# expect: Base.__init__(a, b)