/usr/include/kdevplatform/shell/ is in kdevplatform-dev 5.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/kdevplatform/shell/checkerstatus.h
/usr/include/kdevplatform/shell/core.h
/usr/include/kdevplatform/shell/documentcontroller.h
/usr/include/kdevplatform/shell/environmentconfigurebutton.h
/usr/include/kdevplatform/shell/filteredproblemstore.h
/usr/include/kdevplatform/shell/languagecontroller.h
/usr/include/kdevplatform/shell/launchconfiguration.h
/usr/include/kdevplatform/shell/mainwindow.h
/usr/include/kdevplatform/shell/partcontroller.h
/usr/include/kdevplatform/shell/partdocument.h
/usr/include/kdevplatform/shell/plugincontroller.h
/usr/include/kdevplatform/shell/problem.h
/usr/include/kdevplatform/shell/problemconstants.h
/usr/include/kdevplatform/shell/problemmodel.h
/usr/include/kdevplatform/shell/problemmodelset.h
/usr/include/kdevplatform/shell/project.h
/usr/include/kdevplatform/shell/projectcontroller.h
/usr/include/kdevplatform/shell/runcontroller.h
/usr/include/kdevplatform/shell/selectioncontroller.h
/usr/include/kdevplatform/shell/session.h
/usr/include/kdevplatform/shell/sessioncontroller.h
/usr/include/kdevplatform/shell/sessionlock.h
/usr/include/kdevplatform/shell/shellexport.h
/usr/include/kdevplatform/shell/shellextension.h
/usr/include/kdevplatform/shell/sourceformattercontroller.h
/usr/include/kdevplatform/shell/textdocument.h
/usr/include/kdevplatform/shell/uicontroller.h