[Issue 11616] Introduce virtual keyword and remove virtual-by-default

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=11616

--- Comment #15 from Sobirari Muhomori <dfj1esp02 at sneakemail.com> ---
As I understand, in C++ `virtual final` works like `final override` would work
in D.

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