Tunelling 1 piece of information through 20 layers of abstraction

Advanced tunelling all the way to sfx2

Exhausted beyond recognition arrived to [Flat]ODF filter

Change-Id: I0597c20c28f5cf8e2c60c4398622b36bda83abd0
Reviewed-on: https://gerrit.libreoffice.org/41777Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>