code: func (*Service) DeleteNIC(c context.Context, req *crimson.DeleteNICRequest) (*empty.Empty, error) {
  	if err := deleteNIC(c, req.Name, req.Machine); err != nil {
  		return nil, err
  	}
  	return &empty.Empty{}, nil
  }
docs: // DeleteNIC handles a request to delete an existing network interface.