code: public void logStdErr(Level level, String message) {
          System.err.println(level.toString() + " " + message);
      }
docs: Log on stderr.
  Logging should go via the logging system.  This method
  bypasses the logging system going direct to stderr.
  Should not generally be used.  Its used for rare messages
  that come of cmdline usage of ARCReader ERRORs and WARNINGs.
  Override if using ARCReader in a context where no stderr or
  where you'd like to redirect stderr to other than System.err.
  @param level Level to log message at.
  @param message Message to log.