code: func (s *Service) HeartbeatBatch(apiheartbeatbatchrequestmessage *ApiHeartbeatBatchRequestMessage) *HeartbeatBatchCall {
  	c := &HeartbeatBatchCall{s: s, urlParams_: make(gensupport.URLParams)}
  	c.apiheartbeatbatchrequestmessage = apiheartbeatbatchrequestmessage
  	return c
  }
docs: // HeartbeatBatch: Updates multiple build leases.