RFR: JDK-8304959: Public API in javafx.css.Match should not return private API class PseudoClassState

[Kevin Rushforth]

On Mon, 27 Mar 2023 13:50:40 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> The class `PseudoClassState` is private API, but was exposed erroneously in the CSS API. Instead, `Set<PseudoClass>` should have been used. This PR corrects this.

This was clearly a mistake back when the public API was first created in JDK 9.

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PR Comment: https://git.openjdk.org/jfx/pull/1070#issuecomment-1485291399