Kallen Tu
d65a0c2de5
Basic language tests that test usage in and out of library for sealed classes. More tests will come later. Change-Id: I298484d214a5fe7602d14ab1d7915c733ef00c34 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/265660 Reviewed-by: Bob Nystrom <rnystrom@google.com> Reviewed-by: Leaf Petersen <leafp@google.com>