Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/20229#discussion_r161345610
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala ---
@@ -17,18 +17,29 @@
package org.apache.spark.ml.feature
-import org.apache.spark.{SparkException, SparkFunSuite}
+import org.apache.spark.SparkException
import org.apache.spark.ml.attribute._
-import org.apache.spark.ml.linalg.Vectors
+import org.apache.spark.ml.linalg.{Vector, Vectors}
--- End diff --
ditto.
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