BryanCutler commented on issue #26370: [SPARK-29727][ML][PYTHON] Use UnaryTransformer as parent class for single input column transformers in PySpark URL: https://github.com/apache/spark/pull/26370#issuecomment-549514887 @huaxingao I'm not sure it makes sense to add a `JavaUnaryTransformer`. The additional things it does, like check the schema and add the transformed column are already done in the scala version of these transformers right?
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