Congratulations! You can call yourself a Dart programmer now. By working through this and the previous chapter, you have acquired a lot of technical skills and gained insights into how Dart works. The main ideas to take away from this chapter are:
Modeling the data of your project in classes, perhaps extending another class or implementing the interface of some classes
The library concept to structure your code at a higher level using packages from other developers and eventually publishing your own app with pub
The basic ways of unit testing a Dart app
In the next chapter, we will graphically design a model for our app and base the code on a modeling framework, all in Dart.