'Mixins in dart 2.1 - "on" keyword

From: https://medium.com/dartlang/announcing-dart-2-1-improved-performance-usability-9f55fca6f31a

Under Mixins:

mixin SomeClass<T extends SomeOtherClass>
on State<T>
implements ThirdClass

What is "on"?



Solution 1:[1]

This mixin can only be applied to classes that extend or implement State<T> which is effectively the state of a stateful widget.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Günter Zöchbauer