/usr/include/kdevplatform/util/ is in kdevplatform-dev 5.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/kdevplatform/util/activetooltip.h
/usr/include/kdevplatform/util/autoorientedsplitter.h
/usr/include/kdevplatform/util/commandexecutor.h
/usr/include/kdevplatform/util/convenientfreelist.h
/usr/include/kdevplatform/util/embeddedfreetree.h
/usr/include/kdevplatform/util/environmentgrouplist.h
/usr/include/kdevplatform/util/environmentselectionwidget.h
/usr/include/kdevplatform/util/executecompositejob.h
/usr/include/kdevplatform/util/focusedtreeview.h
/usr/include/kdevplatform/util/foregroundlock.h
/usr/include/kdevplatform/util/formattinghelpers.h
/usr/include/kdevplatform/util/jobstatus.h
/usr/include/kdevplatform/util/kdevstringhandler.h
/usr/include/kdevplatform/util/kdevvarlengtharray.h
/usr/include/kdevplatform/util/ksharedobject.h
/usr/include/kdevplatform/util/multilevellistview.h
/usr/include/kdevplatform/util/objectlist.h
/usr/include/kdevplatform/util/path.h
/usr/include/kdevplatform/util/placeholderitemproxymodel.h
/usr/include/kdevplatform/util/processlinemaker.h
/usr/include/kdevplatform/util/projecttestjob.h
/usr/include/kdevplatform/util/pushvalue.h
/usr/include/kdevplatform/util/richtextpushbutton.h
/usr/include/kdevplatform/util/utilexport.h
/usr/include/kdevplatform/util/widgetcolorizer.h