A modern programming language that makes developers happier.

kotlinlang

###@NotNull in Java
I'm not entirely sure if I'm doing something wrong here... [@NotNull](<https://kotlinlang.org/docs/reference/java-interop.html#nullability-annotations>)

- I marked my ***abstract method*** in my ***Java class*** with `@NotNull` on the return value (it returns a `String`)
- I subclassed this ***Java class*** in ***Kotlin***
- I implemented the _abstract method_ in the _Kotlin class_ 
- but IntelliJ accepts both `: String` and `:String?` without complaints... I want to limit it so that only `:String` is valid - which is what I thought that link was saying `@NotNull` was for... what did I misunderstand?