242             return Err(SessionError {  in handle_describe()
290             return Err(SessionError {  in handle_announce()
303                     if let Err(err) = sender_out.send(msg) {  in handle_announce()
475             return Err(SessionError {  in handle_play()
522                     return Err(SessionError {  in handle_play()
537         if let Err(err) = self.event_producer.send(subscribe_event) {  in unsubscribe_from_stream_hub()
574             Err(_) => {  in handle_teardown()
576                 Err(SessionError {  in handle_teardown()
731                 return Err(ChannelError {  in send_prior_data()
758                                 if let Err(err) = sender.send(frame_data) {  in send_prior_data()
775                                 if let Err(err) = sender.send(frame_data) {  in send_prior_data()
787                                 if let Err(err) = sender.send(frame_data) {  in send_prior_data()
797                 if let Err(err) = sender.send(FrameData::MediaInfo {  in send_prior_data()
819         if let Err(err) = sender.send(Information::Sdp {  in send_information()