temporarily put back an @Incubating @Deprecated operation

[gavinking]

We could put this @Incubating operation back just for this release, since Reactive was calling it.

On the other hand, it's not necessary, since the impact on Reactive was trivial.

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[gavinking]

Leaving this here just in case @DavideD, @yrodiere, or @sebersole feel they want to include it in the release.