jpopesculian opened a new issue, #7603:
URL: https://github.com/apache/arrow-rs/issues/7603

   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   
   I need to access some metadata from the underlying writer of 
`AsyncArrowWriter` after the writer has closed, but I have no way of accessing 
the underlying writer. For context, I'm writing the a byte stream to a server 
and would like to get the response of the server on success.
   
   **Describe the solution you'd like**
   
   Similar to `BufWriter` implementations in the std library and tokio::io, I'd 
like to add an `into_inner` function that consumes the writer and returns the 
underlying writer.
   
   **Describe alternatives you've considered**
   
   I could use a mutex or channels to return the data, but I'm unfortunately 
using this in a WASM context which is limiting.
   
   **Additional context**
   <!--
   Add any other context or screenshots about the feature request here.
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