/usr/ is in libkf5windowsystem-dev 5.44.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/include/
/usr/include/KF5/
/usr/include/KF5/KWindowSystem/
/usr/include/KF5/KWindowSystem/KKeyServer
/usr/include/KF5/KWindowSystem/KSelectionOwner
/usr/include/KF5/KWindowSystem/KSelectionWatcher
/usr/include/KF5/KWindowSystem/KStartupInfo
/usr/include/KF5/KWindowSystem/KUserTimestamp
/usr/include/KF5/KWindowSystem/KWindowEffects
/usr/include/KF5/KWindowSystem/KWindowInfo
/usr/include/KF5/KWindowSystem/KWindowSystem
/usr/include/KF5/KWindowSystem/KXMessages
/usr/include/KF5/KWindowSystem/NETWM
/usr/include/KF5/KWindowSystem/config-kwindowsystem.h
/usr/include/KF5/KWindowSystem/fixx11h.h
/usr/include/KF5/KWindowSystem/kkeyserver.h
/usr/include/KF5/KWindowSystem/kkeyserver_x11.h
/usr/include/KF5/KWindowSystem/kmanagerselection.h
/usr/include/KF5/KWindowSystem/kselectionowner.h
/usr/include/KF5/KWindowSystem/kselectionwatcher.h
/usr/include/KF5/KWindowSystem/kstartupinfo.h
/usr/include/KF5/KWindowSystem/kusertimestamp.h
/usr/include/KF5/KWindowSystem/kwindoweffects.h
/usr/include/KF5/KWindowSystem/kwindowinfo.h
/usr/include/KF5/KWindowSystem/kwindowsystem.h
/usr/include/KF5/KWindowSystem/kwindowsystem_export.h
/usr/include/KF5/KWindowSystem/kxmessages.h
/usr/include/KF5/KWindowSystem/netwm.h
/usr/include/KF5/KWindowSystem/netwm_def.h
/usr/include/KF5/KWindowSystem/private/
/usr/include/KF5/KWindowSystem/private/kwindoweffects_p.h
/usr/include/KF5/KWindowSystem/private/kwindowinfo_p.h
/usr/include/KF5/KWindowSystem/private/kwindowsystem_p.h
/usr/include/KF5/KWindowSystem/private/kwindowsystemplugininterface_p.h
/usr/include/KF5/kwindowsystem_version.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5WindowSystem/
/usr/lib/x86_64-linux-gnu/cmake/KF5WindowSystem/KF5WindowSystemConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5WindowSystem/KF5WindowSystemConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5WindowSystem/KF5WindowSystemTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5WindowSystem/KF5WindowSystemTargets.cmake
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_KWindowSystem.pri
/usr/share/
/usr/share/doc/libkf5windowsystem-dev/
/usr/share/doc/libkf5windowsystem-dev/copyright
/usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so
/usr/share/doc/libkf5windowsystem-dev/changelog.Debian.gz