Calling add_group or add_persistent_group twice will add any new settings defined. Raise a ValueError if add_group or add_persistent_group is called during a call to add_group or add_persistent_group.
Calling add_group or add_persistent_group twice will add any new settings defined. Raise a ValueError if add_group or add_persistent_group is called during a call to add_group or add_persistent_group.