/usr/ is in libqtgtl-dev 0.9.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/QtGTL.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/QtShiva.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libqtgtl-dev/
/usr/share/doc/libqtgtl-dev/copyright
/usr/include/
/usr/include/QtShiva/
/usr/include/QtShiva/SourceParametersWidget.h
/usr/include/QtShiva/ParametersWidgetBase.h
/usr/include/QtShiva/KernelParametersWidget.h
/usr/include/QtGTL/
/usr/include/QtGTL/QImageImage.h
/usr/include/QtGTL/QImageBuffer.h
/usr/lib/x86_64-linux-gnu/libQtGTL.so
/usr/lib/x86_64-linux-gnu/libQtShiva.so
/usr/share/doc/libqtgtl-dev/changelog.Debian.gz