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onFail

Platform and version requirements: JVM (1.0)
fun onFail(
    function: (File, IOException) -> Unit
): FileTreeWalk

Set a callback function, that is called on a directory when it's impossible to get its file list.

onEnter and onLeave callback functions are called even in this case.

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/-file-tree-walk/on-fail.html