"invalid reference" to flexible and surroud queryry parsers at QueryParser module javadoc

[mkhludnev]

Description

see: https://lucene.apache.org/core/10_1_0/queryparser/index.html
lucene/queryparser/src/java/overview.html links flexible and surround parser packages, but these root packages are empty, and are not exported as empty (fwiw). Note: flexible/package-info contains valuable javadoc.
As a result, invalid reference labels are rendered at the linked page.

[mkhludnev]

[pseudo-nymous]

Since, these two package are empty (no classes present in root package), java doc doesn't run on it. This is an old bug which has not been resolved. More details: here

We can use a hacky solution to get around it by adding a placeholder class which can be removed once other classes are added to this package. What do you recommend?

[mkhludnev]

Pardon. It's not my wheelhouse. Placeholder classes are going be madness. I'm afraid they will spill IDE's autocomplete popups.