tree 9a5f902e0331b0cccb67fa8ece388cfcf71b72ed
parent 996f1c945eb49bc68c7a3d48183a01deb9db320f
author pq <pquitslund@google.com> 1628087410 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1628087410 +0000

add UseResult.unless({... , this.parameterDefined});

Sample use:

```
@UseResult.unless(parameterDefined: 'count')
Matcher hasCount([int? count]) => Matcher();
```

See: https://github.com/dart-lang/sdk/issues/46727


Change-Id: I507659c09072157d67433f347d1fa6b511a93a7c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/208721
Commit-Queue: Phil Quitslund <pquitslund@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>