public MultipleFileDownload downloadDirectory(String bucketName, String keyPrefix, File destinationDirectory, KeyFilter filter) {
        return downloadDirectory(bucketName, keyPrefix, destinationDirectory, false, filter);
    }
Returns a boolean value indicating if object can be downloaded in parallel
when using presigned url.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/transfer/TransferManager.java