fn limited_exercise_upload_stream(
field: Field,
batch_bytes: Arc<AtomicU64>,
) -> (GenericPayload, Arc<Mutex<Option<ControllerError>>>, Arc<AtomicU64>)Expand description
Returns a side channel for typed upload-limit errors because the stream yields anyhow errors,
and the running byte count of this part. Both are only meaningful once upload_stream has
returned: the count is still climbing while the stream is being consumed.