+ static synfig::String get_layer_descriptions(const std::list<synfig::Layer::Handle> layers, synfig::String singular_prefix = "", synfig::String plural_prefix = "");
+ static synfig::String get_layer_descriptions(const std::list<std::pair<synfig::Layer::Handle,int> > layers, synfig::String singular_prefix = "", synfig::String plural_prefix = "");