Get last value inserted into a Set

I was not able to find any method to get last value inserted in set from ECMA 2015 Specification, may be they never intended such a method, but you can do something like:

const a = new Set([1, 2, 3]);
a.add(10);
const lastValue = Array.from(a).pop();

Edit:

on second thought, a space efficient solution might be:

function getLastValue(set){
  let value;
  for(value of set);
  return value;
}

const a = new Set([1, 2, 3]);
a.add(10);
console.log('last value: ', getLastValue(a));