Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/20786#discussion_r175957767
--- Diff: mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala ---
@@ -135,32 +175,59 @@ class LeafNode private[ml] (
override private[ml] def maxSplitFeatureIndex(): Int = -1
+}
+
+/**
+ * Decision tree leaf node for classification.
+ * @param prediction Prediction this node makes
--- End diff --
I think you don't need to add these Param doc strings since you're
overriding methods with doc strings. The base trait doc string should show up.
(here and elsewhere)
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