code: func Values(w io.Writer, r Output) error {
  	if r.Error != nil {
  		return prettyError(w, r.Error)
  	}
  	for _, rs := range r.Result {
  		line := make([]interface{}, len(rs.Expressions))
  		for i := range line {
  			line[i] = rs.Expressions[i].Value
  		}
  		if err := JSON(os.Stdout, line); err != nil {
  			return err
  		}
  	}
  	return nil
  }
docs: // Values prints the values from r to w.