Of this abstraction. The values for getRadius() or getCircumference() in the above instance may very well be stored right, or they may be calculated, it won't subject to the caller; the setters may well or might not have side effects; it does not make a difference towards the caller. Google https://propertyingurugram.in/pre-sales-numbers-indicate-a-strong-q4-for-real-estate-majors/