aa.keys, synchronized and shared

[torhu]

On Thursday, 10 November 2022 at 21:55:26 UTC, torhu wrote:
> I'm trying to make a more thread-safe wrapper for AA's:
>
> ```
> synchronized final class SyncAA(K, V) ///

I chose to fix this by just using `synchronized (this)` inside 
each method instead, for now. Still interested in cleaner 
solutions, but I guess synchronized/shared is a bit of a rabbit 
hole...