Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned example may be saved straight, or they may be calculated, it won't issue into the caller; the setters might or may not have Unwanted side effects; it won't matter for the caller. Will work just like a https://propertyingurugram.in/altf-coworking-launches-new-properties-in-noida-and-gurgaon/