code: func NewNaiveDiffDriver(driver ProtoDriver, uidMaps, gidMaps []idtools.IDMap) Driver {
  	return &NaiveDiffDriver{ProtoDriver: driver,
  		uidMaps: uidMaps,
  		gidMaps: gidMaps}
  }
docs: // NewNaiveDiffDriver returns a fully functional driver that wraps the
  // given ProtoDriver and adds the capability of the following methods which
  // it may or may not support on its own:
  //     Diff(id, parent string) (archive.Archive, error)
  //     Changes(id, parent string) ([]archive.Change, error)
  //     ApplyDiff(id, parent string, diff archive.Reader) (size int64, err error)
  //     DiffSize(id, parent string) (size int64, err error)