code: private static boolean maybeLogRequest(RequestUri uri, Properties header, Properties parms) {
      LogFilterLevel level = LogFilterLevel.LOG;
      for (HttpLogFilter f : _filters)
        level = level.reduce(f.filter(uri, header, parms));
      switch (level) {
        case DO_NOT_LOG: 
          return false; // do not log the request by default but allow parameters to be logged on exceptional completion
        case URL_ONLY:
          Log.info(uri, ", parms: <hidden>");
          return true; // parameters are sensitive - never log them
        default:
          Log.info(uri + ", parms: " + parms);
          return false;
      }
    }
docs: Log the request (unless it's an overly common one).
  @return flag whether the request parameters might be sensitive or not