pub fn new_duplex_connection_with_limit<T: DeserializeOwned + Serialize + Unpin, R: AsyncRead + Unpin, W: AsyncWrite + Unpin>(
size_limit: u64,
checksum_enabled: ChecksumEnabled,
raw_read: R,
raw_write: W,
) -> (AsyncReadConverse<R, W, T>, AsyncWriteConverse<W, T>)