/**
 * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
/**
 * @module bookmark/utils
 */
/**
 * Returns `true` if the bookmark id is valid; otherwise, returns `false`.
 *
 * @internal
 */
export declare function isBookmarkIdValid(id: string): boolean;