54     type Error;  typedef
68     fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>;  in poll_ready()  argument
89     fn start_send(self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error>;  in start_send()  argument
103     fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>;  in poll_flush()  argument
116     fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>;  in poll_close()  argument
120     type Error = S::Error;  typedef
122     fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_ready()  argument
126     fn start_send(mut self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error> {  in start_send()  argument
130     fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_flush()  argument
134     fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_close()  argument
144     type Error = <P::Target as Sink<Item>>::Error;  typedef
146     fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_ready()  argument
150     fn start_send(self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error> {  in start_send()  argument
154     fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_flush()  argument
158     fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_close()  argument
169         type Error = Never;  typedef
171         fn poll_ready(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_ready()  argument
175         fn start_send(self: Pin<&mut Self>, item: T) -> Result<(), Self::Error> {  in start_send()  argument
181         fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_flush()  argument
185         fn poll_close(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_close()  argument
191         type Error = Never;  typedef
193         fn poll_ready(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_ready()  argument
197         fn start_send(self: Pin<&mut Self>, item: T) -> Result<(), Self::Error> {  in start_send()  argument
203         fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_flush()  argument
207         fn poll_close(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {  in poll_close()  argument
213         type Error = S::Error;  typedef
218         ) -> Poll<Result<(), Self::Error>> {  in poll_ready()
222         fn start_send(mut self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error> {  in start_send()  argument
229         ) -> Poll<Result<(), Self::Error>> {  in poll_flush()
236         ) -> Poll<Result<(), Self::Error>> {  in poll_close()