Sealed classes - would you want them in D?

[KingJoffrey]

On Thursday, 17 May 2018 at 01:36:47 UTC, KingJoffrey wrote:
>
> how about adding a 'private' attribute on the class, which 
> would mean, private inside the class is only accessible inside 
> the class.
>
> I presume the private attribute on the class, is not currently 
> valid in D?
>

or even 'sealed' (as in the actual meaning of the word)