Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/15430
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GitHub user yanboliang opened a pull request:
https://github.com/apache/spark/pull/15430
[SPARK-15957][Follow-up][ML][PySpark] Add Python API for RFormula
forceIndexLabel.
## What changes were proposed in this pull request?
Follow-up work of #13675, add Python API for
