db.out.flush();
    private void releaseObject(isc_db_handle_impl db, int op, int id) throws GDSException {        synchronized (db) {            try {                db.out.writeInt(op);                db.out.writeInt(id);                receiveResponse(db);            }            catch (IOException ioe) {                throw new GDSException(isc_net_read_err);            }        }    }