virtual boost::shared_ptr<Region> bounce_range (framepos_t start, framepos_t end, InterThreadInfo&,
boost::shared_ptr<Processor> endpoint, bool include_endpoint) = 0;
virtual int export_stuff (BufferSet& bufs, framepos_t start_frame, framecnt_t nframes,
virtual boost::shared_ptr<Region> bounce_range (framepos_t start, framepos_t end, InterThreadInfo&,
boost::shared_ptr<Processor> endpoint, bool include_endpoint) = 0;
virtual int export_stuff (BufferSet& bufs, framepos_t start_frame, framecnt_t nframes,