export declare function getCacheKey(label: string): string;
type CacheKeyFunction = (key: string) => string;
export declare function createCacheKeyFunction(version: number, prefix: string): CacheKeyFunction;
export declare function isCacheKey(key: string): boolean;
export declare function isOldCacheKey(key: string): boolean;
export declare function clearOldCacheKeys(): void;
export {};