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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 add_arguments(cls, parser, sys_arg_list=None):
 """ Callback to add command line options for this plugin to the argparse parser. """

        parser.add_argument('--fixed_cidr', dest="fixed_cidr", required=True,
                            help="specify the route CIDR "
                                 "(only in fixedconf mode)")
        parser.add_argument('--fixed_hosts', dest="fixed_hosts", required=True,
                            help="list of host IPs, separated by ':' "
                                 "(only in fixedconf mode)")
        return ["fixed_cidr", "fixed_hosts"]