huaxingao commented on pull request #28663:
URL: https://github.com/apache/spark/pull/28663#issuecomment-636527903
I don't think the changes in SPARK-29093 affect users. Using
```outputCols``` as an example, the common usage is like this:
```
ohe = OneHotEncoder()
ohe.setInputCols(["input"])
ohe.setOutputCols(["output"])
model = ohe.fit(df)
```
It doesn't matter to the users if ```setOutputCols``` is in
```OneHotEncoder``` or in ```HasOutputCols```. Seems to me that users will not
call ```HasOutputCols.setOutputCols``` directly.
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