'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 });