知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 @MarkusMeskanen: as the object is immutable, and when you mutated it in place you can not specialise it in a subclass. it is going to work as predicted and we didn't have to alter only one line of code inside our library! The truth is, we wouldn't https://homeforsalegurgaon.design.blog/2025/09/12/puri-diplomatic-residences-dwarka-expressway-ultra-luxury-living-at-the-delhi-gurgaon-border/