import React from 'react';
/**
 * Use setTimeout with Hooks in a declarative way.
 *
 * @see https://stackoverflow.com/a/59274757/3723993
 * @see https://overreacted.io/making-setinterval-declarative-with-react-hooks/
 */
export declare const useTimeout: (callback: React.EffectCallback, delay: number | null) => React.MutableRefObject<number | null>;