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kotlinlang

What is the reason that Kotlin Fir visitors use `Nothing?` to denote “no data” rather than `Unit`?

<https://github.com/JetBrains/kotlin/blob/0e4e5ac287c3836ca4434c2c6f626b9145c284e5/compiler/fir/tree/gen/org/jetbrains/kotlin/fir/visitors/FirVisitorVoid.kt#L128>

there is no sematic difference, but pass `null` to `element.accept(visitor, null)` is easier than `Unit`

Thanks!
I was hoping that there's a "right way" for defining a parameter as irrelevant, like `Unit` for function returns. :grin:

But if both are equally okay then also good.