insurance.js

function insurance(obj) {
    return new Proxy(obj, {
        get(target, key) {
            const accessedProperty = Reflect.get(target, key);

            if (typeof accessedProperty === 'object') {
                return insurance(accessedProperty);
            } else {
                return accessedProperty == undefined ?
                Undefined:
                accessedProperty;
            }
        }
    });
}