/usr/ is in libgwengui-fox16-dev 4.20.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/gwenhywfar4/
/usr/include/gwenhywfar4/gwen-gui-fox16/
/usr/include/gwenhywfar4/gwen-gui-fox16/api.h
/usr/include/gwenhywfar4/gwen-gui-fox16/fox16_gui.hpp
/usr/include/gwenhywfar4/gwen-gui-fox16/fox16_htmlctx.hpp
/usr/include/gwenhywfar4/gwen-gui-fox16/fox16_htmllabel.hpp
/usr/include/gwenhywfar4/gwen-gui-fox16/fox16_htmltext.hpp
/usr/include/gwenhywfar4/gwen-gui-fox16/theme.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/gwengui-fox16.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libgwengui-fox16-dev/
/usr/share/doc/libgwengui-fox16-dev/copyright
/usr/lib/x86_64-linux-gnu/libgwengui-fox16.so
/usr/share/doc/libgwengui-fox16-dev/changelog.Debian.gz