code: func EnumerateAll(ctx context.Context, src BlobEnumerator, fn func(blob.SizedRef) error) error {
  	return EnumerateAllFrom(ctx, src, "", fn)
  }
docs: // EnumerateAll runs fn for each blob in src.
  // If fn returns an error, iteration stops and fn isn't called again.
  // EnumerateAll will not return concurrently with fn.