Direct wrappers for ml private DefaultParamsWriter and DefaultParamsReader needed to read/write Spark stages in OP
objectSparkMLSharedParamConstantsextends HasLabelCol with HasFeaturesCol with HasPredictionCol with HasRawPredictionCol with HasProbabilityCol with HasInputCol with HasOutputCol with Product with Serializable
Class containing constants used by spark ML for common parameters (mostly column names).