We will do a final pass through MainFragment and recap all the refactoring we've done.
One small suggestion if I may. This entire course was very heavy on refactoring code, extracting methods, moving classes to separate files etc. JetBrains IDEs have very strong refactoring support for all such actions. It would be nice to see you also show some of them while doing this refactoring to show how it can both speed up the process and allow the developer to refactor with more confidence.
With that said, this was a very interesting course, thank you for it!