assignment property
The axes this scenario is running under, when anything assigned any — what keeps a matrix's captures out of each other's directories, and what a body reads to adapt an expectation to the screen it is on.
Both lanes answer here: a folder profile or a CI list (FW_LANGUAGES)
under flutter test, and the request's own axes (--language,
--device) under the flutterware runner. That agreement is the point —
a base class keying its locale off assignment.language was silently
running every scenarios run --language=nl in English, because the
runner used to leave this null.
Implementation
final ScenarioAssignment? assignment;