Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/19876#discussion_r160461560
--- Diff: mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala ---
@@ -85,12 +87,55 @@ private[util] sealed trait BaseReadWrite {
protected final def sc: SparkContext = sparkSession.sparkContext
}
+/**
+ * ML export formats for should implement this trait so that users can
specify a shortname rather
+ * than the fully qualified class name of the exporter.
+ *
+ * A new instance of this class will be instantiated each time a DDL call
is made.
--- End diff --
Was this supposed to be retained from the `DataSourceRegister`?
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