AA with class keys compared with identity instead of opEquals

[Per Nordlöw]

On Sunday, 27 September 2020 at 18:56:15 UTC, Ferhat Kurtulmuş 
wrote:
> By looking at object.d and aaA.d of druntime, I d say you don't 
> need to use void*. Object class has required infrastructure 
> ready for using classes aa keys (have not tried though). Object 
> class has both toHash and opEquals already implemented.

That's gonna be much slower. And I need key's to be checked for 
equivalence ,not equality.