Can't get an InputStream to a file

It's currently not possible to get an InputStream and manually do the copying. This would be very convenient since I compress files that my app syncs between devices via Box. Having an InputStream would enable me to decompress these files on the fly.

Start by locating the SDK entry point used to retrieve or copy a file, then trace how file data is exposed to the partner app. Define the API needed to obtain an InputStream for a file and verify that callers can manually copy or decompress the stream; the issue names no specific source file or test.

Written by the indexing model from the issue text.