In the opencv github wiki it reads 'IplImage ... are mostly excluded from API and will be completely excluded in further OpenCV 4.x updates'. But in the 4.0.1 version there is still a include\opencv2\core\type_c.h file which contains the structure IplImage. Does it mean we can still use this data structure in opencv 4.0.1 [though it's not recommended to do so]?