- Use 'BKE_object_defgroup' prefix for object functions. - Rename 'defvert_verify_index' to 'defvert_ensure_index' since this adds the group if it isn't found.
- Use 'BKE_object_defgroup' prefix for object functions. - Rename 'defvert_verify_index' to 'defvert_ensure_index' since this adds the group if it isn't found.