Github user zentol commented on the issue:
https://github.com/apache/flink/pull/3838
The only usage i found is in
`UtilityFunctions#smartFunctionDeserialization`, which is only called from
various java UDF classes. Unless there is another usage hidden somewhere i
would suggest to add a `PythonEnvironmentConfig` argument to the
`smartFunctionDeserialization` method, and all UDF classes.
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