6     type Error = E;  typedef
8     fn write(&mut self, byte: u8) -> Result<(), Self::Error> {  in write()
12     fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::Error> {  in write_all()
16     fn flush(&mut self) -> Result<(), Self::Error> {  in flush()
20     fn on_session_start(&mut self) -> Result<(), Self::Error> {  in on_session_start()
26     type Error = E;  typedef
28     fn write(&mut self, byte: u8) -> Result<(), Self::Error> {  in write()
32     fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::Error> {  in write_all()
36     fn flush(&mut self) -> Result<(), Self::Error> {  in flush()
40     fn on_session_start(&mut self) -> Result<(), Self::Error> {  in on_session_start()
46     fn read(&mut self) -> Result<u8, Self::Error> {  in read()
50     fn peek(&mut self) -> Result<Option<u8>, Self::Error> {  in peek()