gengliangwang commented on a change in pull request #33085:
URL: https://github.com/apache/spark/pull/33085#discussion_r658756620
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File path: scalastyle-config.xml
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@@ -323,6 +323,18 @@ This file is divided into 3 sections:
<check level="error"
class="org.scalastyle.scalariform.DeprecatedJavaChecker" enabled="true"></check>
+ <check level="error"
class="org.scalastyle.scalariform.IllegalImportsChecker" enabled="true">
+ <parameters><parameter
name="illegalImports"><![CDATA[scala.collection.Seq,scala.collection.IndexedSeq]]></parameter></parameters>
+ <customMessage><![CDATA[
+ Don't import scala.collection.Seq and scala.collection.IndexedSeq as it
may bring some problems with cross-build between Scala 2.12 and 2.13.
+
+ Please refer below page to see the details of changes around Seq /
IndexedSeq.
Review comment:
```suggestion
Please refer to the following page for the details of changes around
Seq / IndexedSeq.
```
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