Of this abstraction. The values for getRadius() or getCircumference() in the above case in point may very well be stored directly, or they could be calculated, it would not subject to the caller; the setters may or won't have Unintended effects; it doesn't issue for the caller. Conventional getters and https://villasgreaternoida.blogspot.com/2025/06/crafted-for-visionaries-smart-world.html