Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/21078#discussion_r182833420
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/util/Instrumentation.scala ---
@@ -150,3 +156,35 @@ private[spark] object Instrumentation {
}
}
+
+private[spark] class OptionalInstrument private (
+ val instrument: Option[Instrumentation[_ <: Estimator[_]]],
--- End diff --
instrument -> either `instrumentation` or `instr`
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