RFR: 8349373: Support JavaFX preview features [v4]

[Kevin Rushforth]

On Thu, 13 Mar 2025 03:29:28 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 one additional commit since the last revision:
> 
>   warning can be suppressed

Looks good, with one naming suggestion.

modules/javafx.base/src/main/java/com/sun/javafx/PreviewFeature.java line 50:

> 48: 
> 49:     private static final String ENABLE_PREVIEW_PROPERTY = "javafx.enablePreview";
> 50:     private static final String SUPPRESS_WARNING_PROPERTY = "javafx.suppressPreviewBanner";

Perhaps `javafx.suppressPreviewWarning` would be a better name?

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PR Review: https://git.openjdk.org/jfx/pull/1359#pullrequestreview-2682439226
PR Review Comment: https://git.openjdk.org/jfx/pull/1359#discussion_r1993794327