code: func newExponentialBackoff() *exponentialBackoff {
  	b := &backoff.Backoff{
  		Min:    DefaultMinBackoff,
  		Max:    DefaultMaxBackoff,
  		Jitter: true,
  	}
  	return &exponentialBackoff{b: *b, currentDelay: b.Duration()}
  }
docs: // Factory method for exponential backoff, uses default values for Min and Max and
  // adds Jitter.