import { Duration } from './util.js';
export declare function retry<T>(count: number, callback: () => T): Promise<T>;
export declare function retry<T>(count: number, duration: Duration | Generator<number>, callback: () => T): Promise<T>;
export declare function expBackoff(max?: Duration, rand?: Duration): Generator<number, void, unknown>;
export declare function spinner<T>(callback: () => T): Promise<T>;
export declare function spinner<T>(title: string, callback: () => T): Promise<T>;