// Make subtype to avoid recursive UnmarshalXML().
	type subWriterArgs WriterArgs
	parsedArgs := subWriterArgs{}
	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
		return err
	}

	switch len(parsedArgs.RecordDelimiter) {
	case 0:
		parsedArgs.RecordDelimiter = defaultRecordDelimiter
	case 1, 2:
	default:

					if utf8.RuneCountInString(s) > 1 {
						return fmt.Errorf("unsupported QuoteCharacter '%v'", s)
					}
					args.QuoteCharacter = s
				case "QuoteEscapeCharacter":
					switch utf8.RuneCountInString(s) {
					case 0:
						args.QuoteEscapeCharacter = defaultQuoteEscapeCharacter
					case 1:
						args.QuoteEscapeCharacter = s
					default:
						return fmt.Errorf("unsupported QuoteEscapeCharacter '%v'", s)
					}

func (args *ReaderArgs) IsEmpty() bool {
	return !args.unmarshaled
}

// UnmarshalXML - decodes XML data.
func (args *ReaderArgs) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// Make subtype to avoid recursive UnmarshalXML().
	type subReaderArgs ReaderArgs
	parsedArgs := subReaderArgs{}
	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
		return err
	}