code: func Bindings(w io.Writer, r Output) error {
  	if r.Error != nil {
  		return prettyError(w, r.Error)
  	}
  	for _, rs := range r.Result {
  		if err := JSON(w, rs.Bindings); err != nil {
  			return err
  		}
  	}
  	return nil
  }
docs: // Bindings prints the bindings from r to w.