7     type Error = E;  typedef
9     fn write(&mut self, byte: u8) -> Result<(), Self::Error> {  in write()
13     fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::Error> {  in write_all()
17     fn flush(&mut self) -> Result<(), Self::Error> {  in flush()
21     fn on_session_start(&mut self) -> Result<(), Self::Error> {  in on_session_start()
27     type Error = E;  typedef
29     fn write(&mut self, byte: u8) -> Result<(), Self::Error> {  in write()
33     fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::Error> {  in write_all()
37     fn flush(&mut self) -> Result<(), Self::Error> {  in flush()
41     fn on_session_start(&mut self) -> Result<(), Self::Error> {  in on_session_start()
47     fn read(&mut self) -> Result<u8, Self::Error> {  in read()
51     fn peek(&mut self) -> Result<Option<u8>, Self::Error> {  in peek()