psolomin commented on code in PR #23540:
URL: https://github.com/apache/beam/pull/23540#discussion_r1142582454


##########
sdks/java/io/amazon-web-services2/src/main/java/org/apache/beam/sdk/io/aws2/kinesis/StaticCheckpointGenerator.java:
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@@ -19,18 +19,18 @@
 
 import static 
org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkNotNull;
 
-/** Always returns the same instance of checkpoint. */
 class StaticCheckpointGenerator implements CheckpointGenerator {
+  private static final long serialVersionUID = 5972850685627641931L;

Review Comment:
   > here, but also for all other classes of this IO that get serialized
   
   Should I add `serialVersionUID` for `KinesisSource` then?



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