Github user tedyu commented on a diff in the pull request: https://github.com/apache/spark/pull/10664#discussion_r59631589 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala --- @@ -566,4 +576,88 @@ object PrefixSpan extends Logging { @Since("1.5.0") class PrefixSpanModel[Item] @Since("1.5.0") ( @Since("1.5.0") val freqSequences: RDD[PrefixSpan.FreqSequence[Item]]) - extends Serializable + extends Saveable with Serializable { + + /** + * Save this model to the given path. + * It only works for Item datatypes supported by DataFrames. + * + * This saves: + * - human-readable (JSON) model metadata to path/metadata/ + * - Parquet formatted data to path/data/ + * + * The model may be loaded using [[PrefixSpanModel.load]]. + * + * @param sc Spark context used to save model data. + * @param path Path specifying the directory in which to save this model. + * If the directory already exists, this method throws an exception. + */ + @Since("2.0.0") + override def save(sc: SparkContext, path: String): Unit = { --- End diff -- Is sc used ?
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