cloud-fan commented on a change in pull request #26817: [SPARK-30192][SQL] 
support column position in DS v2
URL: https://github.com/apache/spark/pull/26817#discussion_r357493033
 
 

 ##########
 File path: 
sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableChange.java
 ##########
 @@ -17,11 +17,12 @@
 
 package org.apache.spark.sql.connector.catalog;
 
-import org.apache.spark.annotation.Experimental;
-import org.apache.spark.sql.types.DataType;
-
 import java.util.Arrays;
 import java.util.Objects;
+import javax.annotation.Nullable;
+
+import org.apache.spark.annotation.Experimental;
+import org.apache.spark.sql.types.DataType;
 
 Review comment:
   It's not enforced by the linter but we do require it in the style guide.

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