You appear slightly misinformed kind sir. When GNOME and MATE relied on gconf
and mate-conf
respectively, users of dockbarx
were able to integrate it into gnome-panel
, mate-panel
and even avant-window-navigator
(before updates broke it).
Users can in present day and onward install DockbarX in systems using XFCE and add xfce4-dockbarx-plugin
to much the same effect, using (I presume with what limited knowledge I have) xfconf
in much the same way.
What you may be talking about is dockx
, which doesn’t really work for me because its own applets are lacking, and I was seriously considering use of xfce4-panel
until I discovered that xfce4-xfapplet-plugin
isn’t a thing anymore because of MATE’s move to dconf
.