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kotlinlang

I am trying to use `File.walk` however I am not able to get it resolved. IntelliJ always shows me `java.nio.file.Files.walk` instead of the extension
```public fun File.walk(direction: FileWalkDirection = FileWalkDirection.TOP_DOWN): FileTreeWalk =
    FileTreeWalk(this, direction)```


It should be in the normal stdlib, which is added to your project by default since 1.4

However `FileTreeWalk` is resolved - that is weird somehow

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It’s called as an extension function on a `File` instance, not as a static method call. `File("some/dir").walk().forEach { }`