import { Cache } from '../load.types';
/**
 * A very simple Least Recently Used cache,
 * Inspired by https://medium.com/dsinjs/implementing-lru-cache-in-javascript-94ba6755cda9
 */
export declare class LRUCache<TKey, TValue> implements Cache<TKey, TValue> {
    limit: number;
    private size;
    private head?;
    private tail?;
    private map;
    constructor(limit?: number);
    private detach;
    set(key: TKey, value: TValue): TValue;
    get(key: TKey): TValue | undefined;
    clear(): void;
}