docs: public static BackoffStrategy randomBackoff(long minimumTime, TimeUnit minimumTimeUnit,
                                            long maximumTime, TimeUnit maximumTimeUnit) {
          Preconditions.checkNotNull(minimumTimeUnit, "The minimum time unit may not be null");
          Preconditions.checkNotNull(maximumTimeUnit, "The maximum time unit may not be null");
          return new RandomBackoffStrategy(minimumTimeUnit.toMillis(minimumTime),
                  maximumTimeUnit.toMillis(maximumTime));
      }