Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/19110#discussion_r137068863
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala ---
@@ -297,6 +298,15 @@ final class OneVsRest @Since("1.4.0") (
def setPredictionCol(value: String): this.type = set(predictionCol,
value)
/**
+ * @group expertSetParam
+ * The implementation of parallel one vs. rest runs the classification
for
+ * each class in a separate threads.
+ */
--- End diff --
from the previous PR, `@group expertSetParam` should be at the bottom
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