code: protected void printHelp(List<String> errorMessages, PrintStream stream) {
          stream.println(coreBundle.getString("errors"));
          for (String message : errorMessages) {
              stream.println("  " + message);
          }
          stream.println();
      }
docs: If any errors have been found, print the list of errors first, then print the command line help text.
  
  @param errorMessages List of error messages
  @param stream        the output stream to write the text to