import { IHttpCacheConfiguration } from './Interfaces/IHttpCacheConfiguration';
import { IHttpCacheTTL } from './Interfaces/IHttpCacheTTL';
/**
 * @public
 */
export declare class HttpCacheTTL implements IHttpCacheTTL {
    private readonly _config;
    private readonly _cache;
    constructor(config: IHttpCacheConfiguration);
    isValid(key: string): boolean;
    set(key: string, ttl?: number): void;
    delete(key: string): void;
}
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