Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/22986#discussion_r233056300
--- Diff: mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala ---
@@ -538,7 +538,7 @@ private[ml] object GBTClassifierParams {
Array("logistic").map(_.toLowerCase(Locale.ROOT))
}
-private[ml] trait GBTClassifierParams extends GBTParams with
TreeClassifierParams {
+private[ml] trait GBTClassifierParams extends GBTParams with
TreeRegressorParams {
--- End diff --
@srowen I think the only alternative here us to avoid extending either of
them and define the `impurity` param directly into this trait. What do you
think?
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