Method forEach

core_js/utils/Multimap.js:122–126

(callback, thisArg)

        return this._map.keys();
    }
    forEach(callback, thisArg) {
        for (const [key, value] of this.entries()) {
            callback.call(thisArg === undefined ? this : thisArg, key, value, this);
        }
    }
    [Symbol.iterator]() {
        return this.entries();
    }