63     io: Arc<Mutex<Box<dyn TNetIO + Send + Sync>>>,  field
114         let io = Arc::new(Mutex::new(net_io));  in new()  localVariable
117             io: io.clone(),  in new()
119             writer: AsyncBytesWriter::new(io),  in new()
131                 let data = self.io.lock().await.read().await?;  in run()
139                             let data = self.io.lock().await.read().await?;  in run()
168                     track.on_rtcp(&mut cur_reader, self.io.clone()).await;  in on_rtp_over_rtsp_message()
348                             track.create_packer(self.io.clone()).await;  in handle_setup()
428                         move |io: Arc<Mutex<Box<dyn TNetIO + Send + Sync>>>, packet: RtpPacket| {  in handle_play()
431                                 let mut bytes_writer = AsyncBytesWriter::new(io);  in handle_play()
444                         move |io: Arc<Mutex<Box<dyn TNetIO + Send + Sync>>>, packet: RtpPacket| {  in handle_play()
446                                 let mut bytes_writer = AsyncBytesWriter::new(io);  in handle_play()