filter.setInputType(CStdType.Void);
    public static void removeIO(SIRFilter filter) {        filter.setPush(new JIntLiteral(0));        filter.setOutputType(CStdType.Void);        filter.setPop(new JIntLiteral(0));        filter.setPeek(new JIntLiteral(0));        filter.setInputType(CStdType.Void);    }