function functionConst(arg) {

    const obj = {};

    obj.fn = () => console.log(obj, arg);

  return obj;

}

function functionVar(arg) {

    var obj = {};

    obj.fn = () => console.log(obj, arg);

  return obj;

}

function functionLet(arg) {

    let obj = {};

    obj.fn = () => console.log(obj, arg);

  return obj;

​

}