Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned illustration might be saved right, or they could be calculated, it would not issue towards the caller; the setters might or may not have Unwanted effects; it does not make any difference for the caller. This mistake https://maxestatesgurgaon.video.blog/2025/05/12/smart-world-the-edition-sector-66-gurgaon-a-new-era-of-luxury-urban-living/