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346 BJavaScriptView Raw
1'use strict';
2// TODO: remove from `core-js@4`
3var $ = require('../internals/export');
4var upsert = require('../internals/map-upsert');
5
6// `WeakMap.prototype.upsert` method (replaced by `WeakMap.prototype.emplace`)
7// https://github.com/tc39/proposal-upsert
8$({ target: 'WeakMap', proto: true, real: true, forced: true }, {
9 upsert: upsert
10});