153 pub struct SendError {  struct
154     kind: SendErrorKind,  argument
175 impl fmt::Display for SendError {  implementation
185 impl std::error::Error for SendError {}  implementation
187 impl SendError {  impl
240     pub fn into_send_error(self) -> SendError {  in into_send_error()
406     fn poll_ready_nb(&self) -> Poll<Result<(), SendError>> {  in poll_ready_nb()  argument
616     fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
700     pub fn start_send(&mut self, msg: T) -> Result<(), SendError> {  in start_send()  argument
716     pub fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
768     pub fn poll_ready(&self, _: &mut Context<'_>) -> Poll<Result<(), SendError>> {  in poll_ready()  argument
806     pub fn start_send(&mut self, msg: T) -> Result<(), SendError> {  in start_send()  argument