Specifically no "using ..." in a header file. For the 5 places that actually need it.. Change-Id: I5a9d4efa3b19df51a05e7de0b4a825876290579c Reviewed-on: https://gerrit.libreoffice.org/74814 Reviewed-by: Eike Rathke <erack@redhat.com> Tested-by: Jenkins