/**
 * @function CacheResponse
 * @description
 * Custom decorator to enable response caching for a controller method using NestJS CacheInterceptor.
 * This improves performance by avoiding repeated execution for identical requests.
 *
 * If a TTL (Time-To-Live) is provided, the cached result will expire after the given duration (in milliseconds).
 *
 * @param {number} [ttl] - Optional time-to-live for the cached response in milliseconds.
 * @returns {MethodDecorator} A method decorator that applies caching logic to the handler.
 */
export declare function CacheResponse(ttl?: number): MethodDecorator;