Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/11581#discussion_r56107175
--- Diff: mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala ---
@@ -273,7 +273,29 @@ private[ml] object DefaultParamsReader {
sparkVersion: String,
params: JValue,
metadata: JValue,
- metadataJson: String)
+ metadataJson: String) {
+
+ /**
+ * Get the JSON value of the [[org.apache.spark.ml.param.Param]] of
the given name.
+ * This can be useful for getting a Param value before an instance of
[[Params]]
+ * is available.
+ */
+ def getParamValue(paramName: String): JValue = {
--- End diff --
It's in class Metadata, which is in ```private[ml] object
DefaultParamsReader```, so it shouldn't be publicly accessible, right?
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