export declare class ExpirableMap<K, V> {
    private map;
    private cancelScheduledCleaner?;
    protected itemMetadataSortedByExpirationTime: Array<{
        key: K;
        expirationTime: number;
    }>;
    get [Symbol.toStringTag](): string;
    get size(): number;
    set(key: K, value: V, timeToLive?: number): this;
    has(key: K): boolean;
    get(key: K): V | undefined;
    delete(key: K): boolean;
    clear(): void;
    private addItemMetadata;
    private removeItemMetadata;
    private scheduleCleaner;
    private clearExpiredItems;
}