Github user imatiach-msft commented on a diff in the pull request:
https://github.com/apache/spark/pull/17034#discussion_r103853263
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
---
@@ -27,6 +27,8 @@ import org.apache.spark.ml.util.TestingUtils._
import org.apache.spark.mllib.random.{ExponentialGenerator,
WeibullGenerator}
import org.apache.spark.mllib.util.MLlibTestSparkContext
import org.apache.spark.sql.{DataFrame, Row}
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.types._
--- End diff --
I think it is discouraged for readability reasons to use _, consider
specifying the list of types here
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