| 12345678910 | 'use strict';// TODO: remove from `core-js@4`var $ = require('../internals/export');var upsert = require('../internals/map-upsert');// `WeakMap.prototype.upsert` method (replaced by `WeakMap.prototype.emplace`)// https://github.com/tc39/proposal-upsert$({ target: 'WeakMap', proto: true, real: true, forced: true }, {  upsert: upsert});
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