box Node {
    weak parent
    public { name }

    birth() {
        me.name = "Node"
    }

    setParent(p) {
        me.parent = weak p
    }

    getName() {
        return me.name
    }
}

static box Main {
    main() {
        local n1 = new Node()
        local n2 = new Node()
        n1.setParent(n2)  // ✅ weak field + method
        print("OK: mixed members (weak + method + visibility)")
        return 0
    }
}