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FutureOr<Object> --> Object FutureOr<Object>? --> Object? I don't believe this to be breaking because in the current SDK nullable types do not yet exist, and we already landed the change to normalize FutureOr of a top type. Right now Object is still considered a top type. Issue: #40611 Change-Id: I83cb06db9e4bca8cb9b2c041a044904eb1080d2e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/139031 Reviewed-by: Mark Zhou <markzipan@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com>