RFR: Show null restriction markers in javadoc.

[Chen Liang]

On Tue, 3 Feb 2026 15:03:49 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

> Adds null markers inside generated javadoc like this:
> <img width="1144" height="528" alt="null-markers-javadoc" src="https://github.com/user-attachments/assets/b97736ff-f240-4c88-b874-32a8f7c8743c" />
> 
> Not sure if this is the ideal UI, and this is the best way to do implement it.
> 
> I didn't add tests yet, given the representation may change with experience.

This is ok for now, we can patch Utils.getTypeSignature if we find that one need updates too. (Just curious, do method signatures print correctly now)

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Marked as reviewed by liach (Committer).

PR Review: https://git.openjdk.org/valhalla/pull/2022#pullrequestreview-3746233155