Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/19208#discussion_r148885486
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala ---
@@ -271,6 +303,20 @@ class CrossValidatorModel private[ml] (
@Since("1.6.0")
object CrossValidatorModel extends MLReadable[CrossValidatorModel] {
+ private[CrossValidatorModel] def copySubModels(subModels:
Option[Array[Array[Model[_]]]]) = {
+ subModels.map { subModels =>
--- End diff --
Can this be simplified using map?
```
subModels.map(_.map(_.map(_.copy(...).asInstanceOf[...])))
```
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