gistfile1.txt

public class Main {

    public static void main(String[] args) {

        Insurance insurance = new Insurance("insurance1");
        Car car = new Car(Optional.of(insurance));
        Person person = new Person(Optional.of(car));

        Optional<String> s = person.getCar()
                .flatMap(Car::getInsurance)
                .map(Insurance::getName);


    }
}

class Person {

    private Optional<Car> car;

    public Person(Optional<Car> car) {
        this.car = car;
    }

    public Optional<Car> getCar() {
        return car;
    }
}

class Car {

    private Optional<Insurance> insurance;

    public Car(Optional<Insurance> insurance) {
        this.insurance = insurance;
    }

    public Optional<Insurance> getInsurance() {
        return insurance;
    }

}

class Insurance {

    private String name;

    public Insurance(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
}