class Base {
  prefix = "base";
  read(value) { return this.prefix + ":" + value; }
}
class Middle extends Base {}
class Leaf extends Middle {
  own(value) { return this.read(value); }
}
const helpers = {
  invoke(value, input) { return value.read(input); },
  own(value, input) { return value.own(input); },
  extract(value) { return value.read; }
};
export function run() {
  const first = new Leaf();
  const second = new Leaf();
  second.prefix = "second";
  console.log(helpers.invoke(first, "inherited"));
  console.log(helpers.own(first, "own"));
  const method = helpers.extract(first);
  console.log(method === helpers.extract(second));
  console.log(method.call(second, "detached"));
}