code: func BackoffLinearWithJitter(waitBetween time.Duration, jitterFraction float64) BackoffFunc {
  	return func(attempt uint) time.Duration {
  		return backoffutils.JitterUp(waitBetween, jitterFraction)
  	}
  }
docs: // BackoffLinearWithJitter waits a set period of time, allowing for jitter (fractional adjustment).
  //
  // For example waitBetween=1s and jitter=0.10 can generate waits between 900ms and 1100ms.