public MessageDsn unmarshall(StaxUnmarshallerContext context) throws Exception {
    MessageDsn messageDsn = new MessageDsn();

    int originalDepth = context.getCurrentDepth();
    int targetDepth = originalDepth + 1;

    if (context.isStartOfDocument()) targetDepth += 2;

    while (true) {
      int xmlEvent = context.nextEvent();
      if (xmlEvent == XmlPullParser.END_DOCUMENT) break;

      if (xmlEvent == XmlPullParser.START_TAG) {
        if (context.testExpression("ReportingMta", targetDepth)) {
          messageDsn.setReportingMta(StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
        if (context.testExpression("ArrivalDate", targetDepth)) {
          messageDsn.setArrivalDate(DateStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
        if (context.testExpression("ExtensionFields/member", targetDepth)) {
          messageDsn.withExtensionFields(
              ExtensionFieldStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
      } else if (xmlEvent == XmlPullParser.END_TAG) {
        if (context.getCurrentDepth() < originalDepth) {
          break;
        }
      }
    }
    return messageDsn;
  }
  public ReceiptRuleSetMetadata unmarshall(StaxUnmarshallerContext context) throws Exception {
    ReceiptRuleSetMetadata receiptRuleSetMetadata = new ReceiptRuleSetMetadata();
    int originalDepth = context.getCurrentDepth();
    int targetDepth = originalDepth + 1;

    if (context.isStartOfDocument()) targetDepth += 1;

    while (true) {
      XMLEvent xmlEvent = context.nextEvent();
      if (xmlEvent.isEndDocument()) return receiptRuleSetMetadata;

      if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {

        if (context.testExpression("Name", targetDepth)) {
          receiptRuleSetMetadata.setName(StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("CreatedTimestamp", targetDepth)) {
          receiptRuleSetMetadata.setCreatedTimestamp(
              DateStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }
      } else if (xmlEvent.isEndElement()) {
        if (context.getCurrentDepth() < originalDepth) {
          return receiptRuleSetMetadata;
        }
      }
    }
  }