Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3550#discussion_r107026831
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
 ---
    @@ -785,7 +785,7 @@ object AggregateUtil {
         (propPos._1, propPos._2)
       }
     
    -  private def transformToAggregateFunctions(
    --- End diff --
    
    I'm OK with making this method `private[flink]`. @shijinkui is right, that 
this is more visible than necessary but on the other hand, many other methods 
of the Table API have been declared `private[flink]` as well. 


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