Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/22253#discussion_r213863748
--- Diff:
sql/core/src/test/java/test/org/apache/spark/sql/JavaColumnExpressionSuite.java
---
@@ -0,0 +1,80 @@
+package test.org.apache.spark.sql;
--- End diff --
You need to add the Apache License header at the beginning of a file.
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