code: func (s *String) UnmarshalJSON(data []byte) error {
  	var ss pq.StringArray
  	if err := json.Unmarshal(data, &ss); err != nil {
  		return err
  	}
  	*s = String(ss)
  	return nil
  }
docs: // UnmarshalJSON will unmarshall JSON value into
  // the string slice representation of this value.