But only reland the documentation. The test will need some more work.
This is a reland of commit 5354df624a
Original change's description:
> [ffi] NativeCallable.listener example.
>
> Add an example to the NativeCallable.listener documentation.
>
> Bug: https://github.com/dart-lang/sdk/issues/53435
> Change-Id: I4b664b14ca1dbc474913a9e191e38ca6f290350f
> Fixes: https://github.com/dart-lang/sdk/issues/53435
> CoreLibraryReviewExempt: The FFI package is VM-only
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/326580
> Reviewed-by: Daco Harkes <dacoharkes@google.com>
> Commit-Queue: Liam Appelbe <liama@google.com>
Bug: https://github.com/dart-lang/sdk/issues/53435
Change-Id: Iafbf83ddcad47c7ae919f0730f5aa01a999eb083
CoreLibraryReviewExempt: The FFI package is VM-only
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/327440
Reviewed-by: Lasse Nielsen <lrn@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Liam Appelbe <liama@google.com>
Auto-Submit: Liam Appelbe <liama@google.com>
7cb4779869