hoeggi

fixed a copy/past error

add Optional.stream()

3

Let's you convert an Optional to a Stream. Useful if you have a ```@Nullable``` list. Instead of this ``` private static Stream stream(@Nullable T object) { return Optional.of(object).map(value -> {...

I needed this in a project to dynamically change the indicator color. Might as well contribute it back in case you are interested in this.