import { FabCache, FabCacheValue } from '@fab/core';
export declare class Cache implements FabCache {
    private cache;
    constructor();
    set(key: string, value: FabCacheValue, ttl_seconds?: number): Promise<void>;
    setJSON(key: string, value: any, ttl_seconds?: number): Promise<void>;
    get(key: string): Promise<string | undefined>;
    getJSON(key: string): Promise<any>;
    getArrayBuffer(key: string): Promise<ArrayBuffer | undefined>;
    getNumber(key: string): Promise<number | undefined>;
    getStream(key: string): Promise<ReadableStream<any> | undefined>;
    private readAllIfStream;
}