Method shift

src/platform/common/utils/map.ts:330–342

()

    }

    shift(): V | undefined {
        if (!this._head && !this._tail) {
            return undefined;
        }
        if (!this._head || !this._tail) {
            throw new Error('Invalid list');
        }
        const item = this._head;
        this._map.delete(item.key);
        this.removeItem(item);
        this._size--;
        return item.value;
    }

    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    forEach(callbackfn: (value: V, key: K, map: LinkedMap<K, V>) => void, thisArg?: any): void {