export declare class LfuSet<T> implements Set<T> {
    private readonly map;
    constructor(limit: number);
    has(value: T): boolean;
    add(value: T): this;
    delete(value: T): boolean;
    keys(): IterableIterator<T>;
    values(): IterableIterator<T>;
    entries(): IterableIterator<[T, T]>;
    clear(): void;
    [Symbol.toStringTag]: string;
    [Symbol.iterator](): IterableIterator<T>;
    forEach(cb: (value: T, key: T, set: Set<T>) => void, thisArg?: any): void;
    get size(): number;
}
