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kotlinlang

Hi! I'm trying to mock the `<http://java.io|java.io>.File.inputStream()` extension function, but the `FileInputStream` constructor still gets run.
```mockkStatic("<http://kotlin.io|kotlin.io>.FilesKt__FileReadWriteKt")
val fileInputStream = FileInputStream(realFileUri)
every { any&lt;File&gt;().inputStream() } returns fileInputStream
storage.readConfig() // calls file.inputStream()```
The constructor of `FileInputStream` seems to think the mock operand is null and explicitly throws `NullPointerException`.
Any ideas how best to resolve this?