Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/14496
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GitHub user nchammas opened a pull request:
https://github.com/apache/spark/pull/14496
[SPARK-16772] [Python] [Docs] Fix API doc references to UDFRegistration +
Update "important classes"
## Proposed Changes
* Update the list of "important classes" in `pyspark.sql` to
