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flutter - StatelessWidget : Classes can only extend other classes.dart(extends_non_class) - issue - Stack Overflow
![1 Interfaces Reading for today: Sec and corresponding ProgramLive material. Also, compare with previous discussions of abstract classes (Sec. 4.7). - ppt download 1 Interfaces Reading for today: Sec and corresponding ProgramLive material. Also, compare with previous discussions of abstract classes (Sec. 4.7). - ppt download](https://images.slideplayer.com/25/8152581/slides/slide_2.jpg)
1 Interfaces Reading for today: Sec and corresponding ProgramLive material. Also, compare with previous discussions of abstract classes (Sec. 4.7). - ppt download
![presents an example of using enum. In the figure, there is one class... | Download Scientific Diagram presents an example of using enum. In the figure, there is one class... | Download Scientific Diagram](https://www.researchgate.net/publication/363683121/figure/fig2/AS:11431281088480469@1665120304497/presents-an-example-of-using-enum-In-the-figure-there-is-one-class-that-extends-the.png)