Joseph K. Bradley created SPARK-18613:
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             Summary: spark.ml LDA classes should not expose spark.mllib in APIs
                 Key: SPARK-18613
                 URL: https://issues.apache.org/jira/browse/SPARK-18613
             Project: Spark
          Issue Type: Improvement
          Components: ML
            Reporter: Joseph K. Bradley
            Priority: Critical


spark.ml.LDAModel exposes dependencies on spark.mllib in 2 methods, but it 
should not:
* {{def oldLocalModel: OldLocalLDAModel}}
* {{def getModel: OldLDAModel}}

This task is to deprecate those methods.  I recommend creating {{private[ml]}} 
versions of the methods which are used internally in order to avoid deprecation 
warnings.

Setting target for 2.2, but I'm OK with getting it into 2.1 if we have time.



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