code: func (s *Storage) Last(name string) (*rspb.Release, error) {
  	s.Log("getting last revision of %q", name)
  	h, err := s.History(name)
  	if err != nil {
  		return nil, err
  	}
  	if len(h) == 0 {
  		return nil, fmt.Errorf("no revision for release %q", name)
  	}
  
  	relutil.Reverse(h, relutil.SortByRevision)
  	return h[0], nil
  }
docs: // Last fetches the last revision of the named release.