text: /*
   * Copyright 2017 Google
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #import <Foundation/Foundation.h>
  
  #import <FirebaseMessaging/FIRMessaging.h>
  
  #import "Firebase/Messaging/FIRMessagingTopicsCommon.h"
  
  NS_ASSUME_NONNULL_BEGIN
  
  /**
   *  An asynchronous NSOperation subclass which performs a single network request for a topic
   *  subscription operation. Once completed, it calls its provided completion handler.
   */
  @interface FIRMessagingTopicOperation : NSOperation
  
  @property(nonatomic, readonly, copy) NSString *topic;
  @property(nonatomic, readonly, assign) FIRMessagingTopicAction action;
  @property(nonatomic, readonly, copy) NSString *token;
  @property(nonatomic, readonly, copy, nullable) NSDictionary *options;
  
  - (instancetype)initWithTopic:(NSString *)topic
                         action:(FIRMessagingTopicAction)action
                          token:(NSString *)token
                        options:(nullable NSDictionary *)options
                     completion:(FIRMessagingTopicOperationCompletion)completion;
  
  @end
  
  NS_ASSUME_NONNULL_END
  