/**
 * A simple implementation of Least Recently Used (LRU) cache.
 */
export declare class LRUCache<K, V extends ICacheable | null> {
    private cache;
    private readonly maxSize;
    /**
     * Creates a new instance of LRUCache.
     *
     * @param maxSize - The maximum number of items the cache can hold. Defaults to 100.
     */
    constructor(maxSize?: number);
    /**
     * Retrieve a value from the cache.
     *
     * @param key - The key associated with the value to retrieve.
     * @returns The value associated with the key, or `undefined` if the key doesn't exist.
     */
    get(key: K): V | undefined;
    /**
     * Add a new key-value pair to the cache. If the cache exceeds its `maxSize`,
     * it will remove the least recently used item.
     *
     * @param key - The key of the item to add or update.
     * @param value - The value of the item to add or update.
     */
    set(key: K, value: V): void;
    /**
     * Clears all items from the cache.
     */
    clear(): void;
    entries(): MapIterator<[K, V]>;
    length(): number;
}
interface ICacheable {
    __date?: Date;
}
export {};