nextcloud-server/lib/private/PreviewNotAvailableException.php

<?php
/**
 * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OC;

class PreviewNotAvailableException extends \Exception {
}