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rOACCT/node_modules/core-js/modules/esnext.map.map-values.js
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esnext.map.map-values.js
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			'use strict';
			var $ = require('../internals/export');
			var bind = require('../internals/function-bind-context');
			var aMap = require('../internals/a-map');
			var MapHelpers = require('../internals/map-helpers');
			var iterate = require('../internals/map-iterate');

			var Map = MapHelpers.Map;
			var set = MapHelpers.set;

			// `Map.prototype.mapValues` method
			// https://github.com/tc39/proposal-collection-methods
			$({ target: 'Map', proto: true, real: true, forced: true }, {
			mapValues: function mapValues(callbackfn /* , thisArg */) {
			var map = aMap(this);
			var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
			var newMap = new Map();
			iterate(map, function (value, key) {
			set(newMap, key, boundFunction(value, key, map));
			});
			return newMap;
			}
			});