2 var getBuiltIn = require('../internals/get-built-in');
3 var definePropertyModule = require('../internals/object-define-property');
4 var wellKnownSymbol = require('../internals/well-known-symbol');
5 var DESCRIPTORS = require('../internals/descriptors');
7 var SPECIES = wellKnownSymbol('species');
9 module.exports = function (CONSTRUCTOR_NAME) {
10 var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
11 var defineProperty = definePropertyModule.f;
13 if (DESCRIPTORS && Constructor && !Constructor[SPECIES]) {
14 defineProperty(Constructor, SPECIES, {
16 get: function () { return this; }