default FileBackedOutputStream toFbos(Blob blob) throws SQLException, IOException {
        FileBackedOutputStream fbos = new FileBackedOutputStream(THRESHOLD_BYTES);
        ByteStreams.copy(blob.getBinaryStream(), fbos);
        return fbos;
    }
Map a blob JPA entity blob DTO

@author Marc Savy {@literal <marc@blackparrotlabs.io>}
manager/api/beans/src/main/java/io/apiman/manager/api/beans/download/BlobMapper.java