-- a using extension colliding with a real method is WO-E220 — an
-- extension never silently overrides (or loses to) a method
using ext

class Box {
  n: Int
  fn label() -> Text {
    return "method";
  }
}

fn main() -> Int {
  let b = Box { n: 1 };
  print(b.label());
  return 0;
}