rdettai commented on pull request #8300:
URL: https://github.com/apache/arrow/pull/8300#issuecomment-708440082


   An argument in favor of having `ChunkReader` be implemented for 
`T:ParquetReader` rather than `File`:
   -> this allows to write wrappers around `File` that you can then pass to 
`SerializedFileReader`. For instance at some points I wanted to debug the 
number of actual read ops on the `File` object so I wrote a tiny wrapper that 
incremented a counter at each `read()` call...


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