/usr/ is in xfce4-panel-dev 4.12.0-3ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libxfce4panel-1.0/right.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/up.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/home.png
/usr/share/
/usr/share/gtk-doc/
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libxfce4panel-1.0/
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Convenience-Functions.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Panel-Plugin-Register-Macros.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-fundamentals.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/api-index-deprecated.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/style.css
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Version-Information.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/XfcePanelImage.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/api-index-4-6.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-1.0.devhelp2
/usr/share/gtk-doc/html/libxfce4panel-1.0/XfcePanelPlugin.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-miscelleanous.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-GObject-Oriented-Panel-Plugin-Registers-Macros.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/XfceArrowButton.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/up-insensitive.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Commonly-used-plugin-macros.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Standard-Enumerations.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/index.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-widgets.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-Panel-Plugin-Register-Macros-(4.6-Style).html
/usr/share/gtk-doc/html/libxfce4panel-1.0/left-insensitive.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/index.sgml
/usr/share/gtk-doc/html/libxfce4panel-1.0/api-index-4-8.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/left.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/right-insensitive.png
/usr/share/gtk-doc/html/libxfce4panel-1.0/api-index-full.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/libxfce4panel-plugins.html
/usr/share/gtk-doc/html/libxfce4panel-1.0/XfceHVBox.html
/usr/share/doc/
/usr/share/doc/xfce4-panel-dev/
/usr/share/doc/xfce4-panel-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libxfce4panel-1.0.pc
/usr/include/
/usr/include/xfce4/
/usr/include/xfce4/libxfce4panel-1.0/
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-hvbox.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-plugin-provider.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-plugin.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-image.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/libxfce4panel-enum-types.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-macros-46.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-arrow-button.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-macros.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/libxfce4panel-enums.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/libxfce4panel-config.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/xfce-panel-convenience.h
/usr/include/xfce4/libxfce4panel-1.0/libxfce4panel/libxfce4panel.h
/usr/share/doc/xfce4-panel-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libxfce4panel-1.0.so