Is there such as thing as FQ on a subquery?

[Benson Margulies]

I found myself wanting to write ...

      .... OR _query_:{!lucene fq=\"a:b\"}c:d

And then I started looking at query trees in the debugger, and found
myself thinking that there's no possible representation for this -- a
subquery with a filter, since the filters are part of the
RequestBuilder, not part of the query.

Am I missing something?