Great article!!!

I have experience with many different languages and never understood the current situation of using the third-party packages for state management in Flutter.

I have one question.

You use the TimerPageManager instance as a global variable.

Since that class is tightly bound to TimerPage, I thought it would be a good idea to make it a variable of _TimerPageState.

(i.e. generated by the constructor of _TimerPageState and destroyed when _TimerPageState is destroyed)

Is there a problem with doing so? (e.g. in performance)

Is it just a matter of preference?