Github user CodingCat commented on the pull request:

    https://github.com/apache/spark/pull/4844#issuecomment-77086116
  
    Hi, @andrewor14 , thank you very much for the comments
    
    *  For your first concern, it's quiet reasonable, so I just changed the 
code again to loose some accessibility restrictions of the fields/methods.
    
       But I still keep some of them, which mainly stay in 
`master.ApplicationInfo` and `deploy.SparkSubmit`
    
       The reason is that 1) for SparkSubmit, those methods are just accessed 
by the object itself as well as the unit test suite...I guess leaving them to 
be accessible across the whole code base is not that "elegant"? 2) for 
ApplicationInfo...it's more than "elegance", I think we may not wish the 
classes from outside of master package can change the internal status of 
ApplicationInfo instance?
    
    * For your second concern, actually 
https://github.com/apache/spark/pull/4844/files#diff-a240aa7b4630dc389590147f96cf3431R61
 is a nested class of `private[spark] class AppClient` and is only used 
locally.....so let's keep this change?
    
    
    



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