/usr/ is in libmatepolkit-dev 1.8.0+dfsg1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/polkit-gtk-mate-1/
/usr/include/x86_64-linux-gnu/polkit-gtk-mate-1/polkitgtkmate/
/usr/include/x86_64-linux-gnu/polkit-gtk-mate-1/polkitgtkmate/polkitgtkmate.h
/usr/include/x86_64-linux-gnu/polkit-gtk-mate-1/polkitgtkmate/polkitgtkmatetypes.h
/usr/include/x86_64-linux-gnu/polkit-gtk-mate-1/polkitgtkmate/polkitlockbutton.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/polkit-gtk-mate-1.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libmatepolkit-dev/
/usr/share/doc/libmatepolkit-dev/changelog.gz
/usr/share/doc/libmatepolkit-dev/changelog.Debian.gz
/usr/share/doc/libmatepolkit-dev/README
/usr/share/doc/libmatepolkit-dev/NEWS.gz
/usr/share/doc/libmatepolkit-dev/AUTHORS
/usr/share/doc/libmatepolkit-dev/copyright
/usr/lib/x86_64-linux-gnu/libpolkit-gtk-mate-1.so