LIBGTKMM2EXT_API extern std::string unbound_string; /* the key string returned if an action is not bound */
LIBGTKMM2EXT_API extern Glib::RefPtr<Gtk::UIManager> ui_manager;
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LIBGTKMM2EXT_API extern void set_sensitive (std::vector<Glib::RefPtr<Gtk::Action> >& actions, bool);
LIBGTKMM2EXT_API extern std::string get_key_representation (const std::string& accel_path, Gtk::AccelKey& key);