def create_parser(self, prog_name, subcommand):
        return OptionParser(prog=prog_name,
                            usage=self.usage(subcommand),
                            version=self.get_version(),
                            option_list=self.option_list)
``/VolumeDriver.Mount`` sets the primary of the dataset with matching
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/management/base.py/BaseCommand.create_parser--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/dockerplugin/test/test_api.py/APITestsMixin.test_mount_already_exists