/**
 * A LRU cache with a timeout.
 */
export default class Cache<T> {
    private readonly maxAge;
    /**
     * The LRU used for the cache.
     */
    private readonly lru;
    /**
     * The idle timer, used to clear cache if not used during a long time.
     */
    private timer;
    /**
     * The cache constructor.
     *
     * @param maxAge - The maximum amount of time in milliseconds the cache is kept alive while unused.
     * @param capacity - The maximum amount of objects kept in cache.
     */
    constructor(maxAge: number, capacity: number);
    /**
     * Set the item.
     *
     * @param key - The key of the item.
     * @param value - The item to cache.
     */
    set(key: string, value: T): void;
    /**
     * Test if the key is in the cache.
     *
     * @param key - The key to test.
     * @returns True if the key is in the cache.
     */
    has(key: string): boolean;
    /**
     * Retrieve the cached item.
     *
     * @param key - The key of the item to retrieve.
     * @returns The cached item.
     */
    get(key: string): T | undefined;
    /**
     * Clear the content of the cache.
     */
    clear(): void;
    /**
     * Clean the stale objects.
     */
    private resetTimer;
}