docs: private static void sendMessageBatchOperationMd5Check(SendMessageBatchRequest sendMessageBatchRequest,
                                                            SendMessageBatchResult sendMessageBatchResult) {
          Map<String, SendMessageBatchRequestEntry> idToRequestEntryMap = new HashMap<String, SendMessageBatchRequestEntry>();
          if (sendMessageBatchRequest.getEntries() != null) {
              for (SendMessageBatchRequestEntry entry : sendMessageBatchRequest.getEntries()) {
                  idToRequestEntryMap.put(entry.getId(), entry);
              }
          }
  
          if (sendMessageBatchResult.getSuccessful() != null) {
              for (SendMessageBatchResultEntry entry : sendMessageBatchResult.getSuccessful()) {
                  String messageBody = idToRequestEntryMap.get(entry.getId()).getMessageBody();
                  String bodyMd5Returned = entry.getMD5OfMessageBody();
                  String clientSideBodyMd5 = calculateMessageBodyMd5(messageBody);
                  if (!clientSideBodyMd5.equals(bodyMd5Returned)) {
                      throw new AmazonClientException(String.format(MD5_MISMATCH_ERROR_MESSAGE_WITH_ID, MESSAGE_BODY,
                              entry.getId(), clientSideBodyMd5, bodyMd5Returned));
                  }
  
                  Map<String, MessageAttributeValue> messageAttr = idToRequestEntryMap.get(entry.getId())
                          .getMessageAttributes();
                  if (messageAttr != null && !messageAttr.isEmpty()) {
                      String attrMd5Returned = entry.getMD5OfMessageAttributes();
                      String clientSideAttrMd5 = calculateMessageAttributesMd5(messageAttr);
                      if (!clientSideAttrMd5.equals(attrMd5Returned)) {
                          throw new AmazonClientException(String.format(MD5_MISMATCH_ERROR_MESSAGE_WITH_ID,
                                  MESSAGE_ATTRIBUTES, entry.getId(), clientSideAttrMd5, attrMd5Returned));
                      }
                  }
              }
          }
      }