/usr/include/ is in libkf5eventviews-dev 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/
/usr/include/KF5/EventViews/
/usr/include/KF5/EventViews/AgendaView
/usr/include/KF5/EventViews/CalendarDecoration
/usr/include/KF5/EventViews/ConfigDialogInterface
/usr/include/KF5/EventViews/EventView
/usr/include/KF5/EventViews/Helper
/usr/include/KF5/EventViews/JournalView
/usr/include/KF5/EventViews/ListView
/usr/include/KF5/EventViews/MonthView
/usr/include/KF5/EventViews/MultiAgendaView
/usr/include/KF5/EventViews/Prefs
/usr/include/KF5/EventViews/TimeLineView
/usr/include/KF5/EventViews/TodoView
/usr/include/KF5/EventViews/ViewCalendar
/usr/include/KF5/EventViews/WhatsNextView
/usr/include/KF5/EventViews/eventview.h
/usr/include/KF5/EventViews/helper.h
/usr/include/KF5/EventViews/prefs.h
/usr/include/KF5/eventviews/
/usr/include/KF5/eventviews/EventView
/usr/include/KF5/eventviews/Helper
/usr/include/KF5/eventviews/Prefs
/usr/include/KF5/eventviews/agendaview.h
/usr/include/KF5/eventviews/calendardecoration.h
/usr/include/KF5/eventviews/configdialoginterface.h
/usr/include/KF5/eventviews/eventview.h
/usr/include/KF5/eventviews/eventviews_export.h
/usr/include/KF5/eventviews/helper.h
/usr/include/KF5/eventviews/journalview.h
/usr/include/KF5/eventviews/listview.h
/usr/include/KF5/eventviews/monthview.h
/usr/include/KF5/eventviews/multiagendaview.h
/usr/include/KF5/eventviews/prefs.h
/usr/include/KF5/eventviews/timelineview.h
/usr/include/KF5/eventviews/todoview.h
/usr/include/KF5/eventviews/viewcalendar.h
/usr/include/KF5/eventviews/whatsnextview.h
/usr/include/KF5/eventviews_version.h