/usr/ is in libkf5textwidgets-dev 5.18.0-0ubuntu1.
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..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5TextWidgets/
/usr/lib/x86_64-linux-gnu/cmake/KF5TextWidgets/KF5TextWidgetsTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5TextWidgets/KF5TextWidgetsConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5TextWidgets/KF5TextWidgetsConfigVersion.cmake
/usr/include/KF5/KTextWidgets/KRichTextEdit
/usr/lib/x86_64-linux-gnu/cmake/KF5TextWidgets/KF5TextWidgetsTargets-debian.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_KTextWidgets.pri
/usr/include/
/usr/include/KF5/
/usr/include/KF5/KTextWidgets/
/usr/include/KF5/KTextWidgets/kfinddialog.h
/usr/include/KF5/KTextWidgets/krichtextedit.h
/usr/include/KF5/ktextwidgets_version.h
/usr/include/KF5/KTextWidgets/ktextwidgets_export.h
/usr/include/KF5/KTextWidgets/KRegExpEditorInterface
/usr/include/KF5/KTextWidgets/kreplace.h
/usr/include/KF5/KTextWidgets/KReplace
/usr/include/KF5/KTextWidgets/kregexpeditorinterface.h
/usr/include/KF5/KTextWidgets/krichtextwidget.h
/usr/include/KF5/KTextWidgets/KFindDialog
/usr/include/KF5/KTextWidgets/kfind.h
/usr/include/KF5/KTextWidgets/KFind
/usr/include/KF5/KTextWidgets/KPluralHandlingSpinBox
/usr/include/KF5/KTextWidgets/ktextedit.h
/usr/include/KF5/KTextWidgets/KRichTextWidget
/usr/include/KF5/KTextWidgets/KTextEdit
/usr/include/KF5/KTextWidgets/kreplacedialog.h
/usr/include/KF5/KTextWidgets/kpluralhandlingspinbox.h
/usr/include/KF5/KTextWidgets/KReplaceDialog
/usr/share/
/usr/share/doc/
/usr/share/doc/libkf5textwidgets-dev/
/usr/share/doc/libkf5textwidgets-dev/copyright
/usr/lib/x86_64-linux-gnu/libKF5TextWidgets.so
/usr/share/doc/libkf5textwidgets-dev/changelog.Debian.gz