func (s subspace) Sub(el ...tuple.TupleElement) Subspace { return subspace{concat(s.Bytes(), tuple.Tuple(el).Pack()...)} }
// Sub returns a new Subspace whose prefix is the encoding of the provided // element(s). If any of the elements are not a valid tuple.TupleElement, a // runtime panic will occur. func Sub(el ...tuple.TupleElement) Subspace { return subspace{tuple.Tuple(el).Pack()} }