/usr/ is in gnome-software-dev 3.28.1-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/gnome-software/
/usr/include/gnome-software/gnome-software.h
/usr/include/gnome-software/gs-app-list.h
/usr/include/gnome-software/gs-app.h
/usr/include/gnome-software/gs-auth.h
/usr/include/gnome-software/gs-category.h
/usr/include/gnome-software/gs-channel.h
/usr/include/gnome-software/gs-os-release.h
/usr/include/gnome-software/gs-permission-value.h
/usr/include/gnome-software/gs-permission.h
/usr/include/gnome-software/gs-plugin-event.h
/usr/include/gnome-software/gs-plugin-types.h
/usr/include/gnome-software/gs-plugin-vfuncs.h
/usr/include/gnome-software/gs-plugin.h
/usr/include/gnome-software/gs-price.h
/usr/include/gnome-software/gs-utils.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/gnome-software.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/gnome-software-dev/
/usr/share/doc/gnome-software-dev/changelog.Debian.gz
/usr/share/doc/gnome-software-dev/copyright