Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/21037#discussion_r182316985
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionExpressionsSuite.scala
---
@@ -18,6 +18,7 @@
package org.apache.spark.sql.catalyst.expressions
import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.dsl.expressions._
--- End diff --
nit: unnecessary import?
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