docs: public static RateLimiter create(double permitsPerSecond, long warmupPeriod, TimeUnit unit) {
      checkArgument(warmupPeriod >= 0, "warmupPeriod must not be negative: %s", warmupPeriod);
      return create(
          SleepingStopwatch.createFromSystemTimer(), permitsPerSecond, warmupPeriod, unit, 3.0);
    }