Of this abstraction. The values for getRadius() or getCircumference() in the above example might be stored specifically, or they could be calculated, it doesn't subject to the caller; the setters may well or won't have Unintended effects; it does not make any difference into the caller. Earlier Slide Following Slide https://propertyingurugram.in/tarc-appoints-arabian-construction-company-for-construction-of-two-residential-complex-in-delhi-and-gurgaon/