The answers to the question Converting DynamoDB JSON to Standard JSON with Java are obsolete in 2022.
The problem is that both of these imports no longer work:
import com.amazonaws.services.dynamodbv2.document.internal.InternalUtils;
import com.amazonaws.services.dynamodbv2.document.ItemUtils;
What happens: the import fails.
You can also verify it in the documentation, here: https://sdk.amazonaws.com/java/api/latest/index.html?software/amazon/awssdk/services/dynamodb/package-summary.html
The question is, what classes replace these two classes in SDK 2.x?