code: def options(self, parser, env=os.environ):
          
          # pylint:disable=dangerous-default-value
          super(FlakyPlugin, self).options(parser, env=env)
          self.add_report_option(parser.add_option)
          group = OptionGroup(
              parser, "Force flaky", "Force all tests to be flaky.")
          self.add_force_flaky_options(group.add_option)
          parser.add_option_group(group)
docs: Base class override.
          Add options to the nose argument parser.