... existing class. Alternatively, derive a new child class from an existing class, and then add any additional attributes that you need. You may also create an auxiliary class with the additional attributes, ... class, or create an auxiliary classCreate auxiliary classCreate auxiliary classDeactivate existing class or attributeDeactivate existing class or attribute Because there are more than ... child class from the existing class, and then add any additional attributes you need. Create an auxiliary, or placeholder, class containing additional attributes and add the auxiliary to the...