Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned illustration could possibly be stored directly, or they may be calculated, it isn't going to make a difference into the caller; the setters could or won't have Unwanted side effects; it would not matter towards the caller. https://propertyingurugram.in/ncr-real-estate-how-luxury-housing-continues-to-remain-top-choice-among-homebuyers/