Tree.Empty,
clazz.thisSym() != clazz ? mkType(clazz.pos, clazz.typeOfThis()) : Tree.Empty,
    public ClassDef ClassDef(Symbol clazz, Template template) {        ClassDef tree = make.ClassDef(            clazz.pos,            clazz,            mkTypeParamsOf(clazz),            mkParamsOf(clazz),            Tree.Empty,            template);        tree.setType(Type.NoType);        return tree;    }