/usr/ is in libbpp-qt-dev 2.4.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/Bpp/
/usr/include/Bpp/Qt/
/usr/include/Bpp/Qt/MouseListener.h
/usr/include/Bpp/Qt/MouseListeningWidget.h
/usr/include/Bpp/Qt/QtGraphicDevice.h
/usr/include/Bpp/Qt/QtOutputStream.h
/usr/include/Bpp/Qt/QtTools.h
/usr/include/Bpp/Qt/Tree/
/usr/include/Bpp/Qt/Tree/TreeCanvas.h
/usr/include/Bpp/Qt/Tree/TreeCanvasControlers.h
/usr/include/Bpp/Qt/Tree/TreeStatisticsBox.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/bpp-qt/
/usr/lib/x86_64-linux-gnu/cmake/bpp-qt/bpp-qt-config-version.cmake
/usr/lib/x86_64-linux-gnu/cmake/bpp-qt/bpp-qt-config.cmake
/usr/lib/x86_64-linux-gnu/cmake/bpp-qt/bpp-qt-targets-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/bpp-qt/bpp-qt-targets.cmake
/usr/lib/x86_64-linux-gnu/libbpp-qt.a
/usr/share/
/usr/share/doc/
/usr/share/doc/libbpp-qt-dev/
/usr/share/doc/libbpp-qt-dev/copyright
/usr/lib/x86_64-linux-gnu/libbpp-qt.so
/usr/share/doc/libbpp-qt-dev/changelog.Debian.gz