zhengruifeng commented on code in PR #49569:
URL: https://github.com/apache/spark/pull/49569#discussion_r1922317769
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mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala:
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@@ -192,6 +192,10 @@ class DecisionTreeClassificationModel private[ml] (
private[ml] def this(rootNode: Node, numFeatures: Int, numClasses: Int) =
this(Identifiable.randomUID("dtc"), rootNode, numFeatures, numClasses)
+ // For ml connect only
+ @Since("4.0.0")
+ private[ml] def this() = this(Node.dummyNode, 0, 0)
Review Comment:
we are lucky because all the constructors of models are supposed to be
private
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