epubreader/stubs/OC/Hooks/Emitter.php

<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Christoph Wurst <christoph@winzerhof-wurst.at>
 * @author Jörn Friedrich Dreyer <jfd@butonic.de>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Robin Appelman <robin@icewind.nl>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program. If not, see <http://www.gnu.org/licenses/>
 */

namespace OC\Hooks;

/**
 * Class Emitter.
 *
 * interface for all classes that are able to emit events
 *
 * @deprecated 18.0.0 use events and the \OCP\EventDispatcher\IEventDispatcher service
 */
interface Emitter
{
	public function listen(string $scope, string $method, callable $callback): void;

	public function removeListener(string $scope = null, string $method = null, callable $callback = null): void;
}