HyukjinKwon opened a new pull request, #41584:
URL: https://github.com/apache/spark/pull/41584

   ### What changes were proposed in this pull request?
   
   This PR is a followup of https://github.com/apache/spark/pull/39572 that 
hides the `spark.sql.execution.arrow.useLargeVarTypes` configuration as an 
internal configuration.
   
   
   ### Why are the changes needed?
   
   As described in https://github.com/apache/spark/pull/41569, this feature 
only works for `mapInArrow`, and other cases cannot be completely supported 
because of Arrow side limitation, see 
https://github.com/apache/arrow/issues/35289. Therefore, this PR hides this 
configuration as an internal one for now.
   
   ### Does this PR introduce _any_ user-facing change?
   
   No, this configuration was not released out yet.
   
   ### How was this patch tested?
   
   Ran the Scala linter.


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