claudevdm commented on code in PR #36316:
URL: https://github.com/apache/beam/pull/36316#discussion_r2389548022


##########
sdks/python/apache_beam/coders/coders.py:
##########
@@ -395,6 +395,13 @@ def from_runner_api_parameter(unused_payload, components, 
unused_context):
       else:
         return cls()
 
+  def version_tag(self) -> str:
+    """Appends a version tag to the coder key in the pipeline proto. Versioning

Review Comment:
   > trying to understand possible usecases here
   I dont know the use cases beyond comatibility checks in dataflow runner/ or 
that the implementation of a coder changed.



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