A modern programming language that makes developers happier.

kotlinlang

I've tried many approaches, nothing seems to work.

I don't think there is a solution. The root of your problem is the &lt;*&gt; in the Map, which means all typing information is already lost. Using something like Map&lt;KClass&lt;T&gt;, T&gt; would be a solution, but that is not possible in Kotlin (see <https://stackoverflow.com/questions/55204056/type-or-class-keyed-map|this question on SO>, which also discusses alternatives).

In the code you provided I don't see how the data is populated. If you control that part and can guarantee the type safety yourself just slap a
```@Suppress("UNCHECKED_CAST")```
on there. Otherwise either use as? with nullable return type or be fine with throwing exceptions.

Thanks.  That makes sense.  I even tried reified generics with an inline function to no avail.  I wonder if I just switch to some kind of wholly functional approach, maybe I can magic up some above-the-JVM generics system.

type-safety in this situation is achieved through a THC, o better, SymbolMap: <https://stevewedig.com/2014/08/28/type-safe-heterogenous-containers-in-java/>

Interesting! Thanks Matteo, I’m checking it out