pub fn poll_accept(&self, cx: &mut Context<'_>) -> Poll<io::Result<(UnixStream, SocketAddr)>> {
        let (stream, peer_addr) = ready!(self.io.poll_accept(cx))?;
        Ok((UnixStream { io: stream }, peer_addr)).into()
    }
Accepts a new incoming connection to this listener.
crates/shadowsocks/src/net/sys/unix/uds.rs