ret = exp.transformExpression(this);
        }
        if (ret != null && ret != exp) {
            ret.setSourcePosition(exp);
        }
        return ret;
    }

    private String lookupClassName(PropertyExpression pe) {
        boolean doInitialClassTest = true;
        String name = "";
        // this loop builds a name from right to left each name part
        // separated by "."