docs: public void resetOldsBlackListHosts() {
      long currentTimeNanos = System.nanoTime();
      Set<Map.Entry<HostAddress, Long>> entries = blacklist.entrySet();
      for (Map.Entry<HostAddress, Long> blEntry : entries) {
        long entryNanos = blEntry.getValue();
        long durationSeconds = TimeUnit.NANOSECONDS.toSeconds(currentTimeNanos - entryNanos);
        if (durationSeconds >= urlParser.getOptions().loadBalanceBlacklistTimeout) {
          blacklist.remove(blEntry.getKey(), entryNanos);
        }
      }
    }