|  | /* | 
|  | *  Copyright 2014 The WebRTC Project Authors. All rights reserved. | 
|  | * | 
|  | *  Use of this source code is governed by a BSD-style license | 
|  | *  that can be found in the LICENSE file in the root of the source | 
|  | *  tree. An additional intellectual property rights grant can be found | 
|  | *  in the file PATENTS.  All contributing project authors may | 
|  | *  be found in the AUTHORS file in the root of the source tree. | 
|  | */ | 
|  |  | 
|  | #import <Foundation/Foundation.h> | 
|  |  | 
|  | @class RTCIceServer; | 
|  |  | 
|  | @protocol ARDTURNClient <NSObject> | 
|  |  | 
|  | // Returns TURN server urls if successful. | 
|  | - (void)requestServersWithCompletionHandler: | 
|  | (void (^)(NSArray *turnServers, | 
|  | NSError *error))completionHandler; | 
|  |  | 
|  | @end |