Unpivot Columns in a FeatureGroup.
| KEY | TYPE | Description |
|---|---|---|
| valueColumn | str | Name of new column containing the row values that were unpivoted. |
| columns | List[str] | Which columns to unpivot. |
| indexColumn | str | Name of new column containing the unpivoted column names as its values |
| exclude | bool | If True, the unpivoted columns are all the columns EXCEPT the ones in the columns argument. Default is False. |