save model

@@ -106,6 +106,9 @@ public class DecisionTree {
                 (DecisionTreeRegressionModel) (model.stages()[1]);
         System.out.println("Learned regression tree model:\n" + treeModel.toDebugString());
         
+        // save model
+        model.save("./decisionTree.model");
+        
     }
     
 }

+package detact;
+
+public class Main {
+}