code: func (field *SortField) String() string {
  	var buf bytes.Buffer
  	if field.Name != "" {
  		_, _ = buf.WriteString(field.Name)
  		_, _ = buf.WriteString(" ")
  	}
  	if field.Ascending {
  		_, _ = buf.WriteString("ASC")
  	} else {
  		_, _ = buf.WriteString("DESC")
  	}
  	return buf.String()
  }
docs: // String returns a string representation of a sort field.