ByRef             809 modules/ts/include/opencv2/ts/ts_gtest.h struct ByRef<T&> { typedef T& type; };  // NOLINT
ByRef             812 modules/ts/include/opencv2/ts/ts_gtest.h #define GTEST_BY_REF_(T) typename ::std::tr1::gtest_internal::ByRef<T>::type