# lib/goog/events/eventid.js

    1// Copyright 2013 The Closure Library Authors. All Rights Reserved.2//3// Licensed under the Apache License, Version 2.0 (the "License");4// you may not use this file except in compliance with the License.5// You may obtain a copy of the License at6//7//      http://www.apache.org/licenses/LICENSE-2.08//9// Unless required by applicable law or agreed to in writing, software10// distributed under the License is distributed on an "AS-IS" BASIS,11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12// See the License for the specific language governing permissions and13// limitations under the License.1415goog.provide('goog.events.EventId');16171819/**20 * A templated class that is used when registering for events. Typical usage:21 * <code>22 *   /** @type {goog.events.EventId.<MyEventObj>}23 *   var myEventId = new goog.events.EventId(24 *       goog.events.getUniqueId(('someEvent'));25 *26 *   // No need to cast or declare here since the compiler knows the correct27 *   // type of 'evt' (MyEventObj).28 *   something.listen(myEventId, function(evt) {});29 * </code>30 *31 * @param {string} eventId32 * @template T33 * @constructor34 * @struct35 * @final36 */37goog.events.EventId = function(eventId) {38  /** @const */ this.id = eventId;39};404142/**43 * @override44 */45goog.events.EventId.prototype.toString = function() {46  return this.id;47};