code: def options(self, parser, env=None):
          
          if env is None:
              env = os.environ
          env_opt_name = 'NOSE_%s' % self.__dest_opt_name.upper()
          parser.add_option("--%s" % self.__opt_name,
                            dest=self.__dest_opt_name,
                            type="string",
                            default=env.get(env_opt_name),
                            help=".ini file providing the environment for the "
                                 "test web application.")
docs: Adds command-line options for this plugin.