code: func (s *Service) Heartbeat(id int64, apiheartbeatrequestbodymessage *ApiHeartbeatRequestBodyMessage) *HeartbeatCall {
  	c := &HeartbeatCall{s: s, urlParams_: make(gensupport.URLParams)}
  	c.id = id
  	c.apiheartbeatrequestbodymessage = apiheartbeatrequestbodymessage
  	return c
  }
docs: // Heartbeat: Updates build lease.