func (s subspace) Unpack(k fdb.KeyConvertible) (tuple.Tuple, error) {
key := k.FDBKey()
if !bytes.HasPrefix(key, s.b) {
return nil, errors.New("key is not in subspace")
}
return tuple.Unpack(key[len(s.b):])
}
func (s subspace) Contains(k fdb.KeyConvertible) bool {
return bytes.HasPrefix(k.FDBKey(), s.b)
}