void toggle (RegionView*);
void toggle (std::vector<RegionView*>&);
long toggle (nframes_t, nframes_t);
void toggle (ARDOUR::AutomationList*);
void toggle (boost::shared_ptr<ARDOUR::Playlist>);
void toggle (RegionView*);
void toggle (std::vector<RegionView*>&);
long toggle (nframes_t, nframes_t);
void toggle (ARDOUR::AutomationList*);
void toggle (boost::shared_ptr<ARDOUR::Playlist>);