Bulk Operation

SPARK-28958 Add classes to represent Java Regressors and RegressionModels

SPARK-28958 Use UnaryTransformer as parent class for single input column transformers in PySpark

SPARK-28958 Add 'private' _XXXParams classes for classification & regression

SPARK-28958 parity between scala ml tuning and python ml tuning

SPARK-28958 PySpark FPGrowthModel supports getter/setter

SPARK-28958 Pyspark ALSModel support getters/setters

SPARK-28958 Add common classes without using JVM backend

SPARK-28958 Pyspark feature models support column setters/getters

SPARK-28958 Pyspark clustering models support column setters/getters/predict

SPARK-28958 Refactor py classes related to DecisionTree

SPARK-28958 Remove automatically generated param setters in _shared_params_code_gen.py

SPARK-28958 Pyspark ClassificationModel and RegressionModel support column setters/getters/predict

SPARK-28958 OneVsRestModel in the py side should not set WeightCol and Classifier