public void visitIfElse(IfStatement stat) {
        stat.setBooleanExpression((BooleanExpression) replaceExpr(stat.getBooleanExpression()));
        stat.setIfBlock(replace(stat.getIfBlock()));
        stat.setElseBlock(replace(stat.getElseBlock()));
    }

    @Override
    @SuppressWarnings("unchecked")
    public void visitTryCatchFinally(TryCatchStatement stat) {
        stat.setTryStatement(replace(stat.getTryStatement()));