zhengruifeng commented on issue #25802: [SPARK-29095][ML] add extractInstances URL: https://github.com/apache/spark/pull/25802#issuecomment-532570363 friendly ping @srowen now more and more algs support sample-weighting, `extractLabeledPoints` are rarely used. We may need to add this method as an alternative to `extractLabeledPoints`. When RF&GBT support weighting, it can be reused in them.
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