pub type Result = std::result::Result<(), Box<dyn std::error::Error>>; pub fn assert_err_display<T: std::fmt::Debug, E: std::error::Error>(    res: std::result::Result<T, E>,    expected: impl AsRef<str>,) {    match res {        Ok(v) => panic!("Expected error '{}', got value {:?}", expected.as_ref(), v),        Err(err) => assert_eq!(err.to_string(), expected.as_ref()),    }} #[cfg(feature = "blocking-io")]mod decode;#[cfg(feature = "blocking-io")]mod encode;#[cfg(feature = "blocking-io")]mod read;#[cfg(feature = "blocking-io")]mod write;