RFR: 8375561: Class NGGroup is in need of some cleanup

[John Hendrikx]

On Fri, 16 Jan 2026 20:46:25 GMT, Christopher Schnick <duke at openjdk.org> wrote:

>> Should I add the explanations in the PR or the JBS issue? Andy also asked for a summary in the JBS issue, so ideally I would combine that
>
> Added a detailed summary for the changes in the JBS issue

Looks okay, it can't ever return `null`; FX is full of unnecessary `null` checks.

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PR Review Comment: https://git.openjdk.org/jfx/pull/2043#discussion_r2700116564