code: func (s *Storage) BlobContents(br blob.Ref) (contents string, ok bool) {
  	s.mu.RLock()
  	defer s.mu.RUnlock()
  	b, ok := s.m[br]
  	if !ok {
  		return
  	}
  	return string(b), true
  }
docs: // TODO(mpl): remove or move BlobContents
  // See comment in https://camlistore-review.googlesource.com/#/c/3986/24/pkg/blobserver/localdisk/localdisk.go
  // BlobContents returns as a string the contents of the blob br.