plugins/uast-kotlin/testData/WhenIs.kt - third_party/github/JetBrains/kotlin - Git at Google

 fun foo(bar: Any) = when(bar) {
     is String -> bar
     !is String -> "<error>"
 }
	fun foo(bar: Any) = when(bar) {
	is String -> bar
	!is String -> "<error>"
	}