With (the latest) lucene 8.7 is it possible to open very old .cfs compound index file of lucene 2.2 with "Luke" ? or alternatively could it be possibile to generate the .idx file for Luke from the .cfs ? the .cfs was generated by compass on top of lucene 2.2, not by lucene directly Is it possible to use a compass generated index containing _b.cfs segments.gen segments_d with solr ?