This a set of samples that demonstrates the extension methods syntax and shows some common use cases of the feature.
This feature was added in Dart 2.6.0. The programs in this folder won't compile in earlier versions.
Read the source code in the example/ directory. The code is split into
separate files according to topics or use cases. For instance,
example/generics.dart explores the intersection between extension methods
and generic types, while example/operator_extensions.dart shows how
you can extend classes with operators.
The files in lib/ are support for the samples in example/. For instance,
lib/some_api.dart is pretending to be an API from another package (because
a common use case for extension methods is to modify classes whose source
code we cannot edit).