Created that real quick, hope it helps... <https://gist.github.com/AregevDev/a848edce3d11a40852f5abb...
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does let return Unit ? iirc it returns the same as the lambda parameter iirc you can do
val a = b?.let { b * 2 }
docs say it is
inline fun <T, R> T.let(block: (T) -> R): R