Because the old EnumSet was a wrapper object, some APIs performed
stateful updates. This CL also ensures that callers are now performing
their own state updates, just as if we were manipulating ints directly.
Change-Id: I305cd42b5e0c9395d1d1dac724a108bf083ab0d4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/379510
Reviewed-by: Nate Biggs <natebiggs@google.com>
Mayank Patke
15366a10b7