Function write_value 

pub fn write_value<W, T>(
    writer: &mut W,
    codec: &dyn Codec,
    value: &T,
    max_bytes: usize,
) -> AppResult<()>
where
    W: Write,
    T: Serialize + ?Sized,

Encode value with codec and write it as one length-delimited frame.

Errors

Returns a typed AppError (cause preserved) if encoding or the frame write fails, or the payload exceeds max_bytes.