public Region getS3Region() {
        return Region.fromValue(getRegion());
    }
Returns the S3 region in {@link Region} format.
<p>
    Do not use this method if {@link S3Link} is created with a region not in {@link Region} enum.
    Use {@link #getRegion()} instead.
</p>

@return S3 region.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/S3Link.java