152 pub struct SendError {  struct
153     kind: SendErrorKind,  argument
174 impl fmt::Display for SendError {  implementation
184 impl std::error::Error for SendError {}  implementation
186 impl SendError {  impl
239     pub fn into_send_error(self) -> SendError {  in into_send_error()
405     fn poll_ready_nb(&self) -> Poll<Result<(), SendError>> {  in poll_ready_nb()  argument
615     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
699     pub fn start_send(&mut self, msg: T) -> Result<(), SendError> {  in start_send()  argument
715     pub fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
767     pub fn poll_ready(&self, _: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
805     pub fn start_send(&mut self, msg: T) -> Result<(), SendError> {  in start_send()  argument