universalHolder u = (universalHolder) has;
GeneralHolder u = (GeneralHolder) has;
  public org.omg.CORBA.portable.InputStream create_input_stream()  {    if (has instanceof universalHolder)      {        universalHolder u = (universalHolder) has;        return u.getInputStream();      }    else      {        cdrBufOutput out = new cdrBufOutput();        out.setOrb(orb);        write_value(out);        cdrBufInput in = new cdrBufInput(out.buffer.toByteArray());        in.setOrb(orb);        return in;      }  }