class ReadOnlyFilteredCOSStream extends COSStream {

    @Override
    public InputStream getUnfilteredStream() throws IOException {
        throw new IOException("getUnfilteredStream  cannot be requested");
    }

      ReadOnlyFilteredCOSStream(COSDictionary existingDictionary, InputStream stream, long length);
    public  ReadOnlyFilteredCOSStream(COSDictionary existingDictionary, InputStreamSupplier<InputStream> stream,
            long length);

}