Github user sethah commented on a diff in the pull request: https://github.com/apache/spark/pull/11119#discussion_r77734849 --- Diff: mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala --- @@ -318,6 +327,14 @@ private[ml] object DefaultParamsWriter { val metadataJson: String = compact(render(metadata)) metadataJson } + + def saveInitialModel[T <: HasInitialModel[_ <: MLWritable]](instance: T, path: String): Unit = { + if (instance.isDefined(instance.getParam("initialModel"))) { --- End diff -- Since we specify the type parameters, you can access the param directly `instance.isDefined(instance.initialModel)`
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