RFR: 8313650: Add hasProperties method to MenuItem and Toggle

[Andy Goryachev]

On Fri, 18 Aug 2023 22:32:12 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> (unless we are also willing to create a new shared interface that Node, MenuItem, and Toggle all inherit)

that would be a clean(er) design, at the expense of slight runtime overhead traversing the interface table.
could there be any other issues?

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PR Comment: https://git.openjdk.org/jfx/pull/1215#issuecomment-1684503500