* @param src the identity of the object that initiated the change
*/
MarkerView* add_marker_view(ImageFrameView* ifv, std::string mark_type, std::string mark_id, nframes_t start, nframes_t dur, void* src) ;
* @param src the identity of the object that initiated the change
*/
MarkerView* add_marker_view(ImageFrameView* ifv, std::string mark_type, std::string mark_id, nframes_t start, nframes_t dur, void* src) ;