/usr/include/wxsmith/wxwidgets/ is in libwxsmithlib-dev 16.01+dfsg-2.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/wxsmith/wxwidgets/properties/
/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
/usr/include/wxsmith/wxwidgets/wxsbaseproperties.h
/usr/include/wxsmith/wxwidgets/wxscodegenerator.h
/usr/include/wxsmith/wxwidgets/wxscodercontext.h
/usr/include/wxsmith/wxwidgets/wxscontainer.h
/usr/include/wxsmith/wxwidgets/wxscorrector.h
/usr/include/wxsmith/wxwidgets/wxscustomwidgetxmlhandler.h
/usr/include/wxsmith/wxwidgets/wxsdeleteitemres.h
/usr/include/wxsmith/wxwidgets/wxsdialogres.h
/usr/include/wxsmith/wxwidgets/wxsdrawingwindow.h
/usr/include/wxsmith/wxwidgets/wxsevents.h
/usr/include/wxsmith/wxwidgets/wxseventseditor.h
/usr/include/wxsmith/wxwidgets/wxsexproperties.h
/usr/include/wxsmith/wxwidgets/wxsflags.h
/usr/include/wxsmith/wxwidgets/wxsframeres.h
/usr/include/wxsmith/wxwidgets/wxsgridpanel.h
/usr/include/wxsmith/wxwidgets/wxsitem.h
/usr/include/wxsmith/wxwidgets/wxsitemeditor.h
/usr/include/wxsmith/wxwidgets/wxsitemeditorcontent.h
/usr/include/wxsmith/wxwidgets/wxsitemeditordragassist.h
/usr/include/wxsmith/wxwidgets/wxsitemfactory.h
/usr/include/wxsmith/wxwidgets/wxsiteminfo.h
/usr/include/wxsmith/wxwidgets/wxsitemres.h
/usr/include/wxsmith/wxwidgets/wxsitemresdata.h
/usr/include/wxsmith/wxwidgets/wxsitemresdataobject.h
/usr/include/wxsmith/wxwidgets/wxsitemrestreedata.h
/usr/include/wxsmith/wxwidgets/wxsitemundobuffer.h
/usr/include/wxsmith/wxwidgets/wxsnewwindowdlg.h
/usr/include/wxsmith/wxwidgets/wxspanelres.h
/usr/include/wxsmith/wxwidgets/wxsparent.h
/usr/include/wxsmith/wxwidgets/wxspredefinedids.h
/usr/include/wxsmith/wxwidgets/wxsscrollingdialogres.h
/usr/include/wxsmith/wxwidgets/wxssizer.h
/usr/include/wxsmith/wxwidgets/wxssizerparentqp.h
/usr/include/wxsmith/wxwidgets/wxsstyle.h
/usr/include/wxsmith/wxwidgets/wxstool.h
/usr/include/wxsmith/wxwidgets/wxstoolspace.h
/usr/include/wxsmith/wxwidgets/wxswidget.h
/usr/include/wxsmith/wxwidgets/wxwidgetsgui.h
/usr/include/wxsmith/wxwidgets/wxwidgetsguiappadoptingdlg.h
/usr/include/wxsmith/wxwidgets/wxwidgetsguiconfigpanel.h
/usr/include/wxsmith/wxwidgets/wxwidgetsres.h
/usr/include/wxsmith/wxwidgets/wxwidgetsresfactory.h