/**
 * @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 watchdog/utils/getsubnodes
 */
/**
 * @internal
 */
export declare function getSubNodes(head: unknown, excludedProperties?: Set<unknown>): Set<unknown>;