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.

Modeling the data of your project in classes, perhaps extending another class or implementing the interface of some classes is certainly one of the main ideas to take away from this chapter. Then, there is the library concept, which allows you to structure your code at a higher level, using packages from other developers and eventually publishing your own app with pub. Finally, we have learned how to apply unit testing to our 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.