class Foo {
  foo(a, b) {
    this.field1 = a;
    this.field2 = b;
  }

  fooPrint() {
    print(this.field1);
    print(this.field2);
  }
}

class Bar < Foo {
  bar(a, b) {
    this.field1 = a;
    this.field2 = b;
  }

  barPrint() {
    print(this.field1);
    print(this.field2);
  }
}

var bar = Bar();
bar.foo("foo 1", "foo 2");
bar.fooPrint();
# expect: foo 1
# expect: foo 2

bar.bar("bar 1", "bar 2");
bar.barPrint();
# expect: bar 1
# expect: bar 2

bar.fooPrint();
# expect: bar 1
# expect: bar 2