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           efrain | 
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           /*
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            * Copyright 2017 Google
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            *
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            * Licensed under the Apache License, Version 2.0 (the "License");
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            * you may not use this file except in compliance with the License.
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            * You may obtain a copy of the License at
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            *
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            *      http://www.apache.org/licenses/LICENSE-2.0
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            *
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            * Unless required by applicable law or agreed to in writing, software
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            * distributed under the License is distributed on an "AS IS" BASIS,
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            * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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            * See the License for the specific language governing permissions and
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            * limitations under the License.
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            */
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           #import <Foundation/Foundation.h>
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           /// Values stored in analyticsEnabledState. Never alter these constants since they must match with
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           /// values persisted to disk.
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           typedef NS_ENUM(int64_t, FIRAnalyticsEnabledState) {
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             // 0 is the default value for keys not found stored in persisted config, so it cannot represent
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             // kFIRAnalyticsEnabledStateSetNo. It must represent kFIRAnalyticsEnabledStateNotSet.
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             kFIRAnalyticsEnabledStateNotSet = 0,
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             kFIRAnalyticsEnabledStateSetYes = 1,
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             kFIRAnalyticsEnabledStateSetNo = 2,
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           };
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           /// The user defaults key for the persisted measurementEnabledState value. FIRAPersistedConfig reads
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           /// measurementEnabledState using this same key.
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           static NSString *const kFIRAPersistedConfigMeasurementEnabledStateKey =
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               @"/google/measurement/measurement_enabled_state";
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           static NSString *const kFIRAnalyticsConfigurationSetEnabledNotification =
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               @"FIRAnalyticsConfigurationSetEnabledNotification";
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           static NSString *const kFIRAnalyticsConfigurationSetMinimumSessionIntervalNotification =
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               @"FIRAnalyticsConfigurationSetMinimumSessionIntervalNotification";
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           static NSString *const kFIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification =
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               @"FIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification";
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           @interface FIRAnalyticsConfiguration : NSObject
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           /// Returns the shared instance of FIRAnalyticsConfiguration.
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           + (FIRAnalyticsConfiguration *)sharedInstance;
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           // Sets whether analytics collection is enabled for this app on this device. This setting is
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           // persisted across app sessions. By default it is enabled.
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           - (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled;
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           /// Sets whether analytics collection is enabled for this app on this device, and a flag to persist
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           /// the value or not. The setting should not be persisted if being set by the global data collection
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           /// flag.
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           - (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled
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                                  persistSetting:(BOOL)shouldPersist;
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           @end
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