code: func (p *Provider) NewService(cfg *aws.Config) lambdaiface.LambdaAPI {
  	if p.DryRun {
  		return dryrun.New(p.Session)
  	} else if cfg != nil {
  		return lambda.New(p.Session, cfg)
  	} else {
  		return lambda.New(p.Session)
  	}
  }
docs: // NewService returns Lambda service with AWS config