code: func DefaultOptions() *Options {
  	return &Options{
  		Retry: func() retry.Iterator {
  			return &retry.ExponentialBackoff{
  				Limited: retry.Limited{
  					Delay:   time.Second,
  					Retries: 5,
  				},
  			}
  		},
  	}
  }
docs: // DefaultOptions are used if no options are specified in Client.