throw new UnimplementedException("flush");
try {  if (_outputStream != null) { _outputStream.flush(); }  if (_writer != null) { _writer.flush(); }  if (flag == OracleModule.OCI_LOB_BUFFER_FREE) { close(env); }  return true;  } catch (Exception ex) { log.log(Level.FINE, ex.toString(), ex); return false; }
  public boolean flush(Env env,                       @Optional("-1") int flag)  {    throw new UnimplementedException("flush");  }