in src/main/java/com/googlesource/gerrit/plugins/ratelimiter/WarningUnlimitedRateLimiter.java [59:72]
  public boolean acquirePermit() {
    boolean acquirePermit = delegate.acquirePermit();
    if (acquirePermit && (usedPermits() == warnLimit)) {
      rateLimitLog.info(
          "{} reached the warning limit of {} {} per {} minutes.",
          userResolver.getUserName(key).orElse(key),
          warnLimit,
          delegate.getType(),
          timeLapse);
      warningWasLogged = true;
    }
    return acquirePermit;
  }