/**
 * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
/**
 * Preload an image URL
 *
 * @param url URL of the image
 */
export declare function preloadImage(url: string): Promise<boolean>;