kbendick commented on PR #5358:
URL: https://github.com/apache/iceberg/pull/5358#issuecomment-1195727449

   Small correction: Right now, as the field is not marked as required, 
implementors can skip sending the field entirely (as opposed to only having the 
option to send null).
   
   We tend to do that within some of the `*Parser.toJson` functions in Java for 
null (e.g. not set the field).
   
   There's nothing stopping implementors from sending the empty dict now, but 
the Java code at least defensively returns an empty ImmutableMap in case it 
parses `null`: 
https://github.com/apache/iceberg/blob/39878c629a6738b0fc99987ccb80da4511525bdc/core/src/main/java/org/apache/iceberg/rest/requests/CreateNamespaceRequest.java#L58-L60
   
   Is there a benefit on the Python side to this requirement?


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