static boost::python::tuple getstate(const layer& l) { boost::python::list s; std::vector<std::string> const& style_names = l.styles(); for (unsigned i = 0; i < style_names.size(); ++i) { s.append(style_names[i]); } return boost::python::make_tuple(l.abstract(),l.title(),l.clear_label_cache(),l.getMinZoom(),l.getMaxZoom(),l.isQueryable(),l.datasource()->params(),s); }