{title: [Option(), ...]}

def parse_to_instance(self, title_of_name_and_default):
        """{title: [Option(), ...]}"""
        result = {}
        for title, name_and_default in title_of_name_and_default.items():
            logger.debug((title, name_and_default))
            result[title] = opts = []
            for opt_str, default in name_and_default:
                logger.debug('%s:%r' % (opt_str, default))
                opt, repeat = self.parse_opt_str(opt_str)
                opt.default = default
                opt_ins = Optional(opt, repeat=repeat)
                for name in opt.names:
                    self.name_2_instance[name] = opt_ins
                opts.append(opt_ins)

        return result