Morphlines.cell and attachments in complex docs?

[Allison, Timothy B.]

I was just looking at SolrCellBuilder, and it looks like there's an assumption 
that documents will not have attachments/embedded objects.  Unless I 
misunderstand the code, users will not be able to search documents inside zips, 
or attachments in msg/ doc/pdf/etc (cf. SOLR-7189).

Are embedded documents extracted in a step before hitting SolrCellBuilder?

Bug or feature?

Thank you!

         Cheers,

                Tim