256 struct BluetoothMetricsLogger::impl {  struct in bluetooth::common::BluetoothMetricsLogger
257   impl(size_t max_bluetooth_session, size_t max_pair_event,  in impl()  function
272   BluetoothLog* bluetooth_log_;
274       headset_profile_connection_counts_;
275   std::recursive_mutex bluetooth_log_lock_;
278   BluetoothSession* bluetooth_session_;
279   uint64_t bluetooth_session_start_time_ms_;
280   A2dpSessionMetrics a2dp_session_metrics_;
281   std::recursive_mutex bluetooth_session_lock_;
283   std::unique_ptr<LeakyBondedQueue<BluetoothSession>> bt_session_queue_;
284   std::unique_ptr<LeakyBondedQueue<PairEvent>> pair_event_queue_;
285   std::unique_ptr<LeakyBondedQueue<WakeEvent>> wake_event_queue_;
286   std::unique_ptr<LeakyBondedQueue<ScanEvent>> scan_event_queue_;