RFR: 8349373: Support JavaFX preview features [v3]

[Kevin Rushforth]

On Fri, 7 Feb 2025 09:16:54 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> This PR contains a definition of preview features for JavaFX, as well as a helper class to verify that an application has opted into preview features.
>
> Michael Strauß has updated the pull request incrementally with four additional commits since the last revision:
> 
>  - javadoc
>  - remove supporting documentation
>  - warning can't be suppressed
>  - initialize PreviewFeature early

The changes look good. I thought of one more option we might consider to check that the version of the preview API that the app compiled against matches the runtime version of the JavaFX runtime. Whether it is worth doing is something we can discuss.

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PR Review: https://git.openjdk.org/jfx/pull/1359#pullrequestreview-2615933747