huh, ok, using `as_slice()` somewhat works? it's doing something strange.
```
async fn stream_telem<'d, T: Instance + 'd>(class: &mut CdcAcmClass<'d, Driver<'d, T>>) -> Result<(), Disconnected> {
    let mut ticker = Ticker::every(Duration::from_millis(100));
    let mut stream = Vec::<u8, 64>::new();
    loop {
        let mut encoder = PbEncoder::new(&mut stream);
        let telem = construct_telem();
        telem.encode_len_delimited(&mut encoder).unwrap();
        info!("wrote buffer! {:?}", stream.as_slice());
        class.write_packet(stream.as_slice()).await?;
        ticker.next().await;
    }
}

```
is the full function, but the print statement, the stream grows with each iteration, so it panics after 64 iterations.
```
INFO  wrote buffer! [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
INFO  wrote buffer! [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
INFO  wrote buffer! [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
^C⏎                                                                                                                                                                

```