devDependencies property
The packages that the tests use besides those of the app, which the matrix adds to the app as dev dependencies, such as the mocks of the platform side of a plugin.
Each is a package as flutter pub add takes it after dev:: a
hosted package by its name, or a package with its descriptor after
@, such as integration_test@{sdk: flutter} for a package of the
Flutter SDK.
Implementation
final List<String> devDependencies;