//std::map<synfig::String,Glib::RefPtr<Gtk::TreeModel> > tree_model_book_;
std::map<synfig::String,Glib::RefPtr<Glib::ObjectBase> > ref_obj_book_;
//std::map<synfig::String,Glib::RefPtr<Gtk::TreeModel> > tree_model_book_;
std::map<synfig::String,Glib::RefPtr<Glib::ObjectBase> > ref_obj_book_;