/**
 * @license Copyright (c) 2003-2025, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
import { type MutableRefObject } from 'react';
/**
 * Custom hook that returns a mutable ref object indicating whether the component is unmounted or not.
 *
 * @returns The mutable ref object.
 */
export declare const useIsUnmountedRef: () => MutableRefObject<boolean>;