mod stdio_transport; use std::pin::Pin; use anyhow::Result;use async_trait::async_trait;use futures::Stream; pub use stdio_transport::*; #[async_trait]pub trait Transport: Send + Sync {    async fn send(&self, message: String) -> Result<()>;    fn receive(&self) -> Pin<Box<dyn Stream<Item = String> + Send>>;    fn receive_err(&self) -> Pin<Box<dyn Stream<Item = String> + Send>>;}