[rakpol]

I agree to an extent ... this example is pretty contrived, but when you start getting around ten filter/map/groupby operations in, it gets a little difficult to follow what's supposed to be happening. So typically, my first step towards breaking it out into a method is separating out the individual streams like above. As is mentioned in a cousin comment, it also looks a lot nicer with type inferencing, but alas we are stuck with the verbosity of standard Java 8 for now.