def get_driver(self, driver=None):
        if driver is not None:
            return self._drivers[driver]
        else:
            return self._drivers
Should be comma separated display names for each groups category.
dataset/ETHPy150Open UniversalDevicesInc/Polyglot/polyglot/nodeserver_api.py/Node.get_driver--crossover with--dataset/ETHPy150Open ofa/connect/open_connect/groups/tests/test_utils.py/GroupsUtilitiesTest.test_groups_categories_string