|  | /* | 
|  | * Copyright (C) 2014 Google Inc. All rights reserved. | 
|  | * | 
|  | * Redistribution and use in source and binary forms, with or without | 
|  | * modification, are permitted provided that the following conditions are | 
|  | * met: | 
|  | * | 
|  | *     * Redistributions of source code must retain the above copyright | 
|  | * notice, this list of conditions and the following disclaimer. | 
|  | *     * Redistributions in binary form must reproduce the above | 
|  | * copyright notice, this list of conditions and the following disclaimer | 
|  | * in the documentation and/or other materials provided with the | 
|  | * distribution. | 
|  | *     * Neither the name of Google Inc. nor the names of its | 
|  | * contributors may be used to endorse or promote products derived from | 
|  | * this software without specific prior written permission. | 
|  | * | 
|  | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 
|  | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 
|  | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 
|  | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 
|  | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 
|  | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 
|  | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 
|  | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 
|  | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 
|  | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 
|  | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 
|  | */ | 
|  |  | 
|  | // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#extendable-event-interface | 
|  | [ | 
|  | Constructor(DOMString type, optional ExtendableEventInit eventInitDict), | 
|  | Exposed=ServiceWorker, | 
|  | ] interface ExtendableEvent : Event { | 
|  | [CallWith=ScriptState, RaisesException] void waitUntil(Promise<any> f); | 
|  | }; |