  def AddLogFileOptions(self, argument_group):
    """Adds the log file option to the argument group.

    Args:
      argument_group (argparse._ArgumentGroup): argparse argument group.
    """
    argument_group.add_argument(
        '--logfile', '--log_file', '--log-file', action='store',
        metavar='FILENAME', dest='log_file', type=str, default='', help=(
            'Path of the file in which to store log messages, by default '
            'this file will be named: "{0:s}-YYYYMMDDThhmmss.log.gz". Note '
            'that the file will be gzip compressed if the extension is '
            '".gz".').format(self.NAME))