[NotNull Values]
9 	<bold>1</bold>.extensionFun() (in Base.baseF())
4 		open fun <bold>Int</bold>.extensionFun() { (in extensionFun() on Int)
9 			<bold>1</bold>.extensionFun() (in Base.baseF())
18 	<bold>2</bold>.extensionFun() (in Derived.derivedF())
4 		open fun <bold>Int</bold>.extensionFun() { (in extensionFun() on Int)
18 			<bold>2</bold>.extensionFun() (in Derived.derivedF())
