'use strict';
var define = require('define-properties');
var getPolyfill = require('./polyfill');
module.exports = function shimFlatMap() {
var polyfill = getPolyfill();
define(
Array.prototype,
{ flatMap: polyfill },
{ flatMap: function () { return Array.prototype.flatMap !== polyfill; } }
);
return polyfill;
};