Github user MLnick commented on the issue:

    https://github.com/apache/spark/pull/14579
  
    After looking at it and considering all the above, I would say the options 
are (1) do nothing; or (2) if we want to support this use case, then we 
implement a single utility method (I would say called `persisted`) that is a 
context manager.
    
    Even though we could _almost_ achieve things with subclassing, we do sort 
of break something and add too much risk/complexity vs reward of the feature 
IMHO.


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