/** @public */
declare const delays: {
    /** @see https://en.wikipedia.org/wiki/Exponential_backoff */
    readonly exponential: (retryCount: number) => number;
};
export declare type DelayNamed = keyof typeof delays;
export declare type Delay = number | DelayNamed;
export declare function isNamed(delay: Delay): delay is DelayNamed;
export default delays;