Of this abstraction. The values for getRadius() or getCircumference() in the above example could be saved right, or they could be calculated, it isn't going to make a difference towards the caller; the setters could possibly or won't have Uncomfortable side effects; it isn't going to matter into the caller. https://propertyingurugram.in/resurgence-of-indian-real-estate-after-a-year-of-pandemic/