Function mz_persist_client::read::fetch_batch_part

pub(crate) async fn fetch_batch_part<T, UpdateFn>(
    shard_id: &ShardId, 
    blob: &(dyn Blob + Send + Sync), 
    metrics: &Metrics, 
    key: &PartialBlobKey, 
    registered_desc: &Description<T>, 
    update_fn: UpdateFn
) -> Result<(), Error> where
    T: Timestamp + Lattice + Codec64,
    UpdateFn: FnMut(&[u8], &[u8], T, [u8; 8]),