code: private void addMessageTypeReservedAttribute(Map<String, MessageAttributeValue> messageAttributes,
                                                   SQSMessage message, String value) throws JMSException {
  
  
          addStringAttribute(messageAttributes, SQSMessage.JMS_SQS_MESSAGE_TYPE, value);
      }
docs: Adds the message type attribute during send as part of the send message
  request.