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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def with_argparser_and_unknown_args(argparser: argparse.ArgumentParser, preserve_quotes: bool = False) -> \ Callable[[argparse.Namespace, List], Optional[bool]]: """A decorator to alter a cmd2 method to populate its ``args`` argument by parsing arguments with the given instance of argparse.ArgumentParser, but also returning unknown args as a list. :param argparser: unique instance of ArgumentParser :param preserve_quotes: if True, then arguments passed to argparse maintain their quotes :return: function that gets passed argparse-parsed args in a Namespace and a list of unknown argument strings A member called __statement__ is added to the Namespace to provide command functions access to the Statement object. This can be useful if the command function needs to know the command line. """

    import functools

    # noinspection PyProtectedMember
    def arg_decorator(func: Callable):
        @functools.wraps(func)
        def cmd_wrapper(cmd2_instance, statement: Union[Statement, str]):
            statement, parsed_arglist = cmd2_instance.statement_parser.get_command_arg_list(command_name,
                                                                                            statement,
                                                                                            preserve_quotes)

            try:
                args, unknown = argparser.parse_known_args(parsed_arglist)
            except SystemExit:
                return
            else:
                setattr(args, '__statement__', statement)
                return func(cmd2_instance, args, unknown)

        # argparser defaults the program name to sys.argv[0]
        # we want it to be the name of our command
        command_name = func.__name__[len(COMMAND_FUNC_PREFIX):]
        argparser.prog = command_name

        # If the description has not been set, then use the method docstring if one exists
        if argparser.description is None and func.__doc__:
            argparser.description = func.__doc__

        # Set the command's help text as argparser.description (which can be None)
        cmd_wrapper.__doc__ = argparser.description

        # Mark this function as having an argparse ArgumentParser
        setattr(cmd_wrapper, 'argparser', argparser)

        return cmd_wrapper

    return arg_decorator