/**
 * Simple LRU cache implementation
 */
export declare class LRUCache<K, V> {
    private readonly maxSize;
    private cache;
    constructor(maxSize?: number);
    get(key: K): V | undefined;
    delete(key: K): void;
    set(key: K, value: V): this;
    clear(): void;
    get size(): number;
    has(key: K): boolean;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
}
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