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/** 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>NS_ASSUME_NONNULL_BEGIN/*** Represents the action taken on a subscription topic.*/typedef NS_ENUM(NSInteger, FIRMessagingTopicAction) {FIRMessagingTopicActionSubscribe,FIRMessagingTopicActionUnsubscribe};NS_ASSUME_NONNULL_END