@Override
            public void set(AttributeValue value, T o) {
                throw new DynamoDBMappingException("not supported; requires @DynamoDBTyped or @DynamoDBTypeConverted");
            }
Default conversion when no match could be determined.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/StandardModelFactories.java