getUMatRef        317 modules/core/include/opencv2/core/mat.hpp     UMat& getUMatRef(int i=-1) const;
getUMatRef       1331 modules/imgproc/src/pyramids.cpp         _dst.getUMatRef(0) = src;
getUMatRef       1333 modules/imgproc/src/pyramids.cpp             pyrDown( _dst.getUMatRef(i-1), _dst.getUMatRef(i), Size(), borderType );