Sphinx 3.2 added support for :noindexentry:, which is similar to :noindex: except that it allows cross-referencing using :ref:`...` .

We currently use :noindex: to prevent the internal modules from appearing in the index, but that prevents us from referencing them. So doing :mod:`owned <OwnedObject>` will fail since there is no entry for OwnedObject. But in this case, if we used :noindexentry:, we could use the cross-reference.