@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        PersonAnnotated person2 = (PersonAnnotated) o;

        if (age != person2.age) return false;
        if (firstName != null ? !firstName.equals(person2.firstName) : person2.firstName != null) return false;
        if (lastName != null ? !lastName.equals(person2.lastName) : person2.lastName != null) return false;

        return true;
    }