The Streams groupingBy method is very important when we need to group a type of data to provide a special kind of information from a List. If you want to understand better how this method work, watch this challenger and absorb this concept!

As mentioned in the video, you can go deep into the automation world with Rodrigo Moutinho content and get his book The Cyborg Developer Cookbook: The Ultimate Guide: https://cyborgdeveloper.tech/

Get the code of the Java Challengers and run your own tests: https://javachallengers.com/code