code: @VisibleForTesting
    static Level getLogLevel(Throwable t) {
      if (t instanceof IOException
          && t.getMessage() != null
          && QUIET_ERRORS.contains(t.getMessage())) {
        return Level.FINE;
      }
      return Level.INFO;
    }
docs: Accepts a throwable and returns the appropriate logging level. Uninteresting exceptions
  should not clutter the log.