I do not believe it can be turned off. You can rea...

# announcements

[jw]

I do not believe it can be turned off. You can read about the justification at http://blog.jetbrains.com/kotlin/2014/10/making-platform-interop-even-smoother/ and http://blog.jetbrains.com/kotlin/2015/04/upcoming-change-more-null-safety-for-java/