CvLineIterator    395 modules/imgcodecs/test/test_drawing.cpp     CvLineIterator it;
CvLineIterator   1089 modules/imgproc/include/opencv2/imgproc/imgproc_c.h                                 CvLineIterator* line_iterator,
CvLineIterator   2566 modules/imgproc/src/drawing.cpp                     CvLineIterator* iterator, int connectivity,