/usr/ is in libpanel-applet-4-dev 1:3.8.0-1ubuntu11.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libpanelapplet-4.0.pc
/usr/include/
/usr/include/gnome-panel-4.0/
/usr/include/gnome-panel-4.0/libpanel-applet/
/usr/include/gnome-panel-4.0/libpanel-applet/panel-applet-enums.h
/usr/include/gnome-panel-4.0/libpanel-applet/panel-applet.h
/usr/include/gnome-panel-4.0/libpanel-applet/panel-applet-gconf.h
/usr/share/
/usr/share/gir-1.0/
/usr/share/gir-1.0/PanelApplet-4.0.gir
/usr/share/doc/
/usr/share/doc/libpanel-applet-4-dev/
/usr/share/doc/libpanel-applet-4-dev/copyright
/usr/lib/libpanel-applet-4.so
/usr/share/doc/libpanel-applet-4-dev/README
/usr/share/doc/libpanel-applet-4-dev/NEWS.gz
/usr/share/doc/libpanel-applet-4-dev/AUTHORS
/usr/share/doc/libpanel-applet-4-dev/changelog.Debian.gz