core-js/modules/es.set.constructor.js

'use strict';
var collection = require('../internals/collection');
var collectionStrong = require('../internals/collection-strong');

// `Set` constructor
// https://tc39.es/ecma262/#sec-set-objects
collection('Set', function (init) {
  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
}, collectionStrong);