Method MyObject4

deps/pybind11-2.13.1/tests/test_smart_ptr.cpp:117–120

class MyObject4 {
public:
    explicit MyObject4(int value) : value{value} {
        print_created(this);
        pointer_set<MyObject4>().insert(this);
    }
    int value;

    static void cleanupAllInstances() {