code: func (s *Service) Cancel(id int64, apicancelrequestbodymessage *ApiCancelRequestBodyMessage) *CancelCall {
  	c := &CancelCall{s: s, urlParams_: make(gensupport.URLParams)}
  	c.id = id
  	c.apicancelrequestbodymessage = apicancelrequestbodymessage
  	return c
  }
docs: // Cancel: Cancels a build.