gobject_class->finalize = pixbuf_document_finalize;
gobject_class->get_property = pixbuf_document_get_property;
gobject_class->set_property = pixbuf_document_set_property;
gobject_class->finalize = pixbuf_document_finalize;
gobject_class->get_property = pixbuf_document_get_property;
gobject_class->set_property = pixbuf_document_set_property;