import { CacheProvider } from './cacheProvider';
/**
 * A cache that prefixes keys with a string.
 */
export declare class PrefixedCache<V> implements CacheProvider<string, V> {
    private readonly inner;
    private readonly prefix;
    constructor(inner: CacheProvider<string, V>, prefix: string);
    get(key: string, loader: (key: string) => Promise<V>): Promise<V>;
    set(key: string, value: V): Promise<void>;
    delete(key: string): Promise<void>;
}