code: func NewStage(name string) *Stage {
  	return &Stage{
  		name:      name,
  		Variables: make(map[string]string),
  	}
  }
docs: // NewStage returns a Stage object with the given name.  Providing a Stage value
  // to NewAPIGateway implies that the API Gateway resources should be deployed
  // (eg: made publicly accessible).  See
  // http://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-deploy-api.html