Add enums with super powers! 1. Enums with string values. ```dart enum { a = "Hello", b = "Allo", c = "Bonjour", } example; ``` 2. Enums with int values. ```dart enum { a = 0, b = 500, c = 600, } example; ``` 3. Enums with constructors. ```dart enum { String(String), Bool(bool), } example; ```