RFR: 8290040: Provide simplified deterministic way to manage listeners [v9]

[John Hendrikx]

On Fri, 2 Dec 2022 01:10:13 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> John Hendrikx has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Adjust Node
>>   
>>   - Fixed javadoc
>>   - Added comment for code that avoid eager instantiation
>>   - Changed `isShown` to use property if it is available
>
> modules/javafx.graphics/src/main/java/javafx/scene/Node.java line 1413:
> 
>> 1411:      * Indicates whether or not this {@code Node} is shown. A node is considered shown if it's
>> 1412:      * part of a {@code Scene} that is part of a {@code Window} whose
>> 1413:      * {@link Window#showingProperty showing property} is {@code true}. The {@link Node#visibleProperty visibility}
> 
> I think you should choose one of the following:
> `...whose {@link Window#showingProperty} is...`
> `...whose {@link Window#showingProperty showing} property is...`

Updated to second variant

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PR: https://git.openjdk.org/jfx/pull/830