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kotlinlang

it's telling me that the `it.get` is expecting `Nothing`.. why?

`joe::class` is `KClass&lt;out Customer&gt;`, because the compiler cannot prove that `joe` is actually a `Customer` and not a _subclass_ of customer. So if you want to call a property getter from that, you can't (hence `Nothing`) because you don't know what the actual type of `joe` and thereby `joe::class` is.

`it.getter.call` works, because `KCallable.call` is not typesafe (it just accepts vararg of `Any?`