- https://medium.com/flutter-community/a-complete-guide-to-flutter-animations-and-all-its-parts-3f427e14d669
- https://medium.com/flutterdevs/modal-bottom-sheet-in-flutter-dae05debbed2
- https://meysam-mahfouzi.medium.com/understanding-animations-in-flutter-b8ec789d94a4 (https://github.com/meysammahfouzi/animated-circle/blob/master/lib/pages/animated_circle_page.dart)
- https://www.digitalocean.com/community/tutorials/dart-mixins
- https://medium.com/flutterdevs/mixins-in-dart-how-to-use-it-90d078e722d3
- https://resocoder.com/2020/08/04/flutter-bloc-cubit-tutorial/