type subOutputSerialization OutputSerialization
	parsedOutput := subOutputSerialization{}
	if err := d.DecodeElement(&parsedOutput, &start); err != nil {
		return errMalformedXML(err)
	}

	found := 0
	if !parsedOutput.CSVArgs.IsEmpty() {
		parsedOutput.format = csvFormat
		found++
	}
	if !parsedOutput.JSONArgs.IsEmpty() {
		parsedOutput.format = jsonFormat
		found++
	}
	if found != 1 {