mix_train_and_test_idx 1972 apps/traincascade/old_ml.hpp     void mix_train_and_test_idx();
mix_train_and_test_idx  672 apps/traincascade/old_ml_data.cpp         mix_train_and_test_idx();
mix_train_and_test_idx  130 modules/ml/test/test_gbttest.cpp     data->mix_train_and_test_idx();