/usr/include/ is in libgoocanvas-2.0-dev 2.0.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/goocanvas-2.0/
/usr/include/goocanvas-2.0/goocanvaswidget.h
/usr/include/goocanvas-2.0/goocanvasrect.h
/usr/include/goocanvas-2.0/goocanvaspath.h
/usr/include/goocanvas-2.0/goocanvaspolyline.h
/usr/include/goocanvas-2.0/goocanvas.h
/usr/include/goocanvas-2.0/goocanvastable.h
/usr/include/goocanvas-2.0/goocanvasmarshal.h
/usr/include/goocanvas-2.0/goocanvasitemmodel.h
/usr/include/goocanvas-2.0/goocanvasellipse.h
/usr/include/goocanvas-2.0/goocanvasenumtypes.h
/usr/include/goocanvas-2.0/goocanvasutils.h
/usr/include/goocanvas-2.0/goocanvasitem.h
/usr/include/goocanvas-2.0/goocanvasgrid.h
/usr/include/goocanvas-2.0/goocanvasstyle.h
/usr/include/goocanvas-2.0/goocanvasgroup.h
/usr/include/goocanvas-2.0/goocanvasimage.h
/usr/include/goocanvas-2.0/goocanvastext.h
/usr/include/goocanvas-2.0/goocanvasitemsimple.h