Checksum for files sent with fastfilereader

[Tom]

Hi all,

If I use filestreamer, which uses fastfilereader under the hood, is
there a way for me to generate a checksum of the full file at
completion, so I can send it to the client? I didn't see a hook for
getting the full file after it has been read, or even callbacks for
the chunks so that I could build it up in memory even if the standard
usage wouldn't keep the full file loaded like that.

Thanks,
Tom