Non-ugly ways to implement a 'static' class or namespace?

[ProtectAndHide]

On Thursday, 16 February 2023 at 02:56:28 UTC, ProtectAndHide 
wrote:
>

What a joke. Even Javascript can do this (and the compile will 
enforce it too).

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Private_class_fields