Deletes a group from the contact store.
- iOS 9.0+
- macOS 10.11+
- Mac Catalyst 13.0+Beta
The group to delete.
This method overrides any previously made add request on the group. The group to be deleted must already exist in the contact store. If it does not, the delete request fails, the
CNError error is thrown, and the
CNError array is updated to contain that object.