foo.cpp

    class Animal {
public:
    virtual ~Animal()=default;
    string get_type() {return "Cow";}
    virtual string get_name() {return "This is the c++ get_name";};
    virtual string echo(string s){return s;}
    virtual int add(int i, int j){return i + j;}
};

...

    auto i = PlatformHelper::create_isolate();
    (*i)([&]{
        i->add_print();
        auto & animal = i->wrap_class<Animal>(); // THESE 3 LINES ARE MY LIBRARY STUFF, BUT YOU CAN ENVISION WHAT THEY DO
        animal.add_method(&Animal::get_type, "get_type").add_method(&Animal::get_name, "get_name");
        animal.add_constructor("Animal", *i);
    
        auto c = i->create_context();
    
        c->run("a=new Animal();a.get_name();"); <=== This line works
        c->run("b=Object.create(new Animal()); b.get_name();"); <== this line returns an internal field of nullptr in my callback for get_name