Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/22236#discussion_r212833419 --- Diff: mllib/src/main/scala/org/apache/spark/ml/fpm/FPGrowth.scala --- @@ -217,9 +217,13 @@ object FPGrowth extends DefaultParamsReadable[FPGrowth] { @Experimental class FPGrowthModel private[ml] ( @Since("2.2.0") override val uid: String, - @Since("2.2.0") @transient val freqItemsets: DataFrame) + @Since("2.2.0") @transient val freqItemsets: DataFrame, + private val itemSupport: Map[Any, Long]) extends Model[FPGrowthModel] with FPGrowthParams with MLWritable { + private[ml] def this(uid: String, freqItemsets: DataFrame) = --- End diff -- Because it's private, you could also just make the new parameter an Option or something rather than recreate the existing constructor separately.
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