Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/12023#discussion_r57674668
--- Diff: mllib/src/main/scala/org/apache/spark/ml/tree/treeModels.scala ---
@@ -238,3 +238,128 @@ private[ml] object DecisionTreeModelReadWrite {
finalNodes.head
}
}
+
+private[ml] object RandomForestModelReadWrite {
+
+ /**
+ * Info for a [[org.apache.spark.ml.tree.Split]]
+ *
+ * @param featureIndex Index of feature split on
+ * @param leftCategoriesOrThreshold For categorical feature, set of
leftCategories.
+ * For continuous feature, threshold.
+ * @param numCategories For categorical feature, number of categories.
+ * For continuous feature, -1.
+ */
+ case class SplitData(
--- End diff --
Why is this copied here? Can you reuse the existing SplitData?
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