Method clear

tests/mod_per_interpreter_gil_with_singleton.cpp:62–70

    }

    static void clear() {
        auto &instance = get_instance();
        (void) instance; // suppress unused variable warning
        assert(instance.objects.size() == 7);
        for (const auto &obj : instance.objects) {
            obj.dec_ref();
        }
        instance.objects.clear();
    }

private:
    std::vector<py::handle> objects;