import * as React from 'react';
/**
 * Custom hook that runs an unmount effect only once.
 * This is similar to `useEffect`, but it only runs on unmount.
 *
 * @param {React.EffectCallback} effect the callback function
 * @returns {void}
 *
 * @example
 * ```tsx
 * const Component = () => {
 *     useUnmountEffect(() => {
 *         console.log('Unmounted');
 *     });
 * };
 * ```
 */
export declare function useUnmountEffect(effect: React.EffectCallback): void;