wip in ml_validation

cdplib/ml_validation/cross_validate_with_fine_tuning.py

@@ -174,7 +174,7 @@ def cross_validate_with_optimal_threshold(
             print("----- In cv threshold fold")
 
             X_train_fold, X_val_fold, y_train_fold, y_val_fold =\
-                CVComposer.cv_slice_dataset(
+                CVComposer().cv_slice_dataset(
                     X=X_train,
                     y=y_train,
                     train_inds=train_inds,