- void add_persistant_stroke(etl::smart_ptr<std::list<synfig::Point> > stroke_point_list, const synfig::Color& color=synfig::Color(0,0,0));
+ void add_persistent_stroke(etl::smart_ptr<std::list<synfig::Point> > stroke_point_list, const synfig::Color& color=synfig::Color(0,0,0));