/usr/include/gammaray/ is in gammaray-dev 2.0.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gammaray/common/
/usr/include/gammaray/common/endpoint.h
/usr/include/gammaray/common/enums.h
/usr/include/gammaray/common/gammaray_common_export.h
/usr/include/gammaray/common/metatypedeclarations.h
/usr/include/gammaray/common/modelroles.h
/usr/include/gammaray/common/objectbroker.h
/usr/include/gammaray/common/objectmodel.h
/usr/include/gammaray/common/propertycontrollerinterface.h
/usr/include/gammaray/common/protocol.h
/usr/include/gammaray/core/
/usr/include/gammaray/core/gammaray_core_export.h
/usr/include/gammaray/core/metaobject.h
/usr/include/gammaray/core/metaobjectrepository.h
/usr/include/gammaray/core/metaproperty.h
/usr/include/gammaray/core/objectmodelbase.h
/usr/include/gammaray/core/objecttypefilterproxymodel.h
/usr/include/gammaray/core/probeinterface.h
/usr/include/gammaray/core/propertycontroller.h
/usr/include/gammaray/core/singlecolumnobjectproxymodel.h
/usr/include/gammaray/core/toolfactory.h
/usr/include/gammaray/core/util.h
/usr/include/gammaray/core/varianthandler.h
/usr/include/gammaray/ui/
/usr/include/gammaray/ui/deferredresizemodesetter.h
/usr/include/gammaray/ui/deferredtreeviewconfiguration.h
/usr/include/gammaray/ui/gammaray_ui_export.h
/usr/include/gammaray/ui/palettemodel.h
/usr/include/gammaray/ui/propertywidget.h
/usr/include/gammaray/ui/tooluifactory.h