code: func (*Service) ListRacks(c context.Context, req *crimson.ListRacksRequest) (*crimson.ListRacksResponse, error) {
  	racks, err := listRacks(c, req)
  	if err != nil {
  		return nil, err
  	}
  	return &crimson.ListRacksResponse{
  		Racks: racks,
  	}, nil
  }
docs: // ListRacks handles a request to retrieve racks.