/usr/include/wxsmith/wxwidgets/properties/ is in libwxsmithlib-dev 13.12+dfsg-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/wxsmith/wxwidgets/properties/wxsarraystringcheckeditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsarraystringcheckproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsbitmapiconeditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsbitmapiconproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxscolourproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsdimensionproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsfonteditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsfontfaceeditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsfontproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagecomboeditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagecomboproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagelisteditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagelistproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsimageproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagetreeeditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxsimagetreeproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxspositionsizeproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxssimplefonteditordlg.h
/usr/include/wxsmith/wxwidgets/properties/wxssizerflagsproperty.h
/usr/include/wxsmith/wxwidgets/properties/wxsstyleproperty.h