Github user Syrux commented on a diff in the pull request:
https://github.com/apache/spark/pull/17575#discussion_r110839571
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
---
@@ -232,6 +200,69 @@ class PrefixSpan private (
object PrefixSpan extends Logging {
/**
+ * This methods finds all frequent items in a input dataset.
+ *
+ * @param data Sequences of itemsets.
+ * @param minCount The minimal number of sequence an item should be
present in to be frequent
+ *
+ * @return An array of Item containing only frequent items.
+ */
+ private[fpm] def findFrequentItems[Item: ClassTag](
+ data: RDD[Array[Array[Item]]],
+ minCount: Long):
+ Array[Item] = {
--- End diff --
Ok, I will push the changes
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