On Tue, 16 Apr 2024 16:08:12 GMT, Andy Goryachev <ango...@openjdk.org> wrote:

>> The ``Node.getPseudoClassStates()`` returns an unmodifiable collection. The 
>> bindings would not work. Therefore we need to use a listener and change the 
>> pseudo-class-state by using the ``Node.pseudoClassStateChanged(PseudoClass, 
>> boolean)`` method.
>
> how silly of me!  you are right, of course.  thank you for clarification.

You are welcome, partner :-). 
It was a surprise for me too. 
It's strange, why it needs to be an unmodifiable collection.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1434#discussion_r1567639883

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