public SendMessageBatchRequestEntry unmarshall(StaxUnmarshallerContext context) throws Exception {
    SendMessageBatchRequestEntry sendMessageBatchRequestEntry = new SendMessageBatchRequestEntry();
    int originalDepth = context.getCurrentDepth();
    int targetDepth = originalDepth + 1;

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

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

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

        if (context.testExpression("Id", targetDepth)) {
          sendMessageBatchRequestEntry.setId(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("MessageBody", targetDepth)) {
          sendMessageBatchRequestEntry.setMessageBody(
              StringStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("DelaySeconds", targetDepth)) {
          sendMessageBatchRequestEntry.setDelaySeconds(
              IntegerStaxUnmarshaller.getInstance().unmarshall(context));
          continue;
        }

        if (context.testExpression("MessageAttribute", targetDepth)) {
          Entry<String, MessageAttributeValue> entry =
              MessageAttributesMapEntryUnmarshaller.getInstance().unmarshall(context);
          sendMessageBatchRequestEntry.getMessageAttributes().put(entry.getKey(), entry.getValue());
          continue;
        }

      } else if (xmlEvent.isEndElement()) {
        if (context.getCurrentDepth() < originalDepth) {
          return sendMessageBatchRequestEntry;
        }
      }
    }
  }