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           // Copyright 2020 Google LLC
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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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           #import "FirebasePerformance/Sources/Instrumentation/FPRNetworkTrace.h"
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           /**
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            * Extension that is added on top of the class FIRHTTPMetric to make the private properties visible
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            * between the implementation file and the unit tests.
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            */
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           NS_EXTENSION_UNAVAILABLE("Firebase Performance is not supported for extensions.")
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           @interface FIRHTTPMetric ()
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           /* Network trace to capture the HTTPMetric information. */
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           @property(nonatomic, strong) FPRNetworkTrace *networkTrace;
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           /**
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            * Marks the end time of the request.
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            */
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           - (void)markRequestComplete;
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           /**
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            * Marks the start time of the response.
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            */
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           - (void)markResponseStart;
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           @end
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