Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned example may very well be stored right, or they could be calculated, it will not matter on the caller; the setters may well or may not have Unwanted side effects; it won't matter into the caller. [one] https://propertyingurugram.in/key-things-you-must-know-before-investing-in-igbc-certified-projects/