first, since those are safer to change than virtual methods

Change-Id: Ie3b624019d75ee2b793cee33b3c5f64e994e8bfe
Reviewed-on: https://gerrit.libreoffice.org/45798Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>