Github user MLnick commented on a diff in the pull request:
https://github.com/apache/spark/pull/12889#discussion_r62178821
--- Diff: python/pyspark/ml/regression.py ---
@@ -708,7 +710,7 @@ def _create_model(self, java_model):
@inherit_doc
-class DecisionTreeModel(JavaModel):
+class DecisionTreeModel(JavaModel, JavaPredictionModel):
--- End diff --
@holdenk what about `LinearRegressionModel`,
`GeneralizedLinearRegressionModel` (though `numFeatures` is missing on the
Scala side), `GBTRegressionModel`, `RandomForestRegressionModel`?
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