holdenk opened a new pull request #25838: [SPARK-29158] Expose 
SerializableConfiguration for DataSource V2 developers
URL: https://github.com/apache/spark/pull/25838
 
 
   ### What changes were proposed in this pull request?
   
   Currently the SerializableConfiguration, which makes the Hadoop 
configuration serializable is private. This makes it public, with a developer 
annotation.
   
   ### Why are the changes needed?
   
   Many data source depend on the Hadoop configuration which may have specific 
components on the driver. Inside of Spark's own DataSourceV2 implementations 
this is frequently used (Parquet, Json, Orc, etc.)
   
   ### Does this PR introduce any user-facing change?
   
   This provides a new developer API.
   
   ### How was this patch tested?
   
   No new tests are added as this only exposes a previously developed & 
thoroughly used + tested component.

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