Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/19904#discussion_r157957676
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala ---
@@ -18,6 +18,7 @@
package org.apache.spark.ml.tuning
import java.util.{List => JList, Locale}
+import java.util.concurrent.atomic.AtomicInteger
--- End diff --
not needed anymore
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