c5a53edb69
The CLI was the only reason this field was mutable; dropping dead support in the CLI means it can instead be a getter. Change-Id: Iaaf3fd2a1cda9b568fb1a743827eb07fa8975319 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/395164 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Samuel Rawlins <srawlins@google.com>