RFR: 8332895: Support interpolation for backgrounds and borders [v2]

[Andy Goryachev]

On Fri, 2 Aug 2024 01:25:06 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> modules/javafx.graphics/src/main/java/javafx/css/StyleableObjectProperty.java line 273:
>> 
>>> 271: 
>>> 272:     private StyleOrigin origin = null;
>>> 273:     private TransitionController<T> controller = null;
>> 
>> minor: `= null` is unnecessary
>
> I agree. Not sure if I should remove it from all of the StyleableProperty implementations, as the `origin = null` is already there.

I know what @kevinrushforth would say: "it is better to avoid introducing unrelated changes"

as long as the new code omits `= null` we should be fine.

(rationale for omitting: explicit initialization creates an unnecessary step in the debugger)

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PR Review Comment: https://git.openjdk.org/jfx/pull/1522#discussion_r1701970897