//void remove_rec_region (boost::shared_ptr<ARDOUR::Region>); (unused)
void display_diskstream (boost::shared_ptr<ARDOUR::Diskstream>);
virtual void undisplay_diskstream ();
//void remove_rec_region (boost::shared_ptr<ARDOUR::Region>); (unused)
void display_diskstream (boost::shared_ptr<ARDOUR::Diskstream>);
virtual void undisplay_diskstream ();