/** A `Map` that forgets its oldest entry once it holds more than `limit`. */
export declare class BoundedMap<Key, Value> {
    private readonly limit;
    private readonly entries;
    constructor(limit: number);
    get(key: Key): Value | undefined;
    forEach(visit: (value: Value, key: Key) => void): void;
    set(key: Key, value: Value): void;
}