export default class ExpirySet<K = any> implements Set<K> {
    private readonly maxAge;
    private readonly data;
    readonly [Symbol.toStringTag]: 'Set';
    constructor(maxAge: number);
    constructor(maxAge: number, values: ReadonlyArray<K> | null | undefined);
    constructor(maxAge: number, iterable: Iterable<K>);
    readonly size: number;
    add(key: K): this;
    clear(): void;
    delete(key: K): boolean;
    has(key: K): boolean;
    values(): IterableIterator<K>;
    keys(): IterableIterator<K>;
    entries(): IterableIterator<[K, K]>;
    forEach(callbackfn: (value: K, value2: K, set: Set<K>) => void, thisArg?: any): void;
    [Symbol.iterator](): IterableIterator<K>;
    private isExpired;
    private createIterator;
}