export declare class LRUCache<K, V> {
    private capacity;
    private cache;
    private keyOrder;
    constructor(capacity: number);
    get(key: K): V | undefined;
    set(key: K, value: V): void;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
    entries(): IterableIterator<[K, V]>;
    size(): number;
    clear(): void;
}