public C4BlobReadStream openReadStream(C4BlobKey blobKey) throws LiteCoreException {
        return new C4BlobReadStream(openReadStream(handle, blobKey.getHandle()));
    }
public C4BlobReadStream openReadStream ( C4BlobKey blobKey ) throws LiteCoreException { return new C4BlobReadStream ( openReadStream ( handle , blobKey . getHandle ( ) ) ) ; }
Opens a blob for reading, as a random-access byte stream.