Are there some comfortable Kotlin (perhaps, online) decompilers? Java decompilers give something like

kotlin.jvm.functions.Function0

There are no Kotlin specific decompilers, as I know

https://kotlinlang.org/docs/reference/whatsnew13.html#functions-with-big-arity Was reading that just now, give an explanation for these weird name

It’s not weird, Lambdas do not exist in bytecode, it’s a name of JVM interface that used to represent lambda

Thanks for clarification. That was confusing part of the reversed code

So all those types (

(A, B) -> C

,

A.(B) -> C

and

suspend () -> Unit

) are represented by Function0/1/.../42/... classes, right?

Yes

Thanks, I'll try ☝️😃