code: def _add_conflicting_arguments(self):
          
          group = self._parser.add_mutually_exclusive_group()
          group.add_argument(
              '-y', '--yes', '--yeah',
              action='store_true',
              help='execute fixed command without confirmation')
          group.add_argument(
              '-r', '--repeat',
              action='store_true',
              help='repeat on failure')
docs: It's too dangerous to use `-y` and `-r` together.