     in the background to clear the queue. No user facing handler
                    can be registered to be notified when messages or frames have
                    completed sending.
                  </p>
<p>
                    Beast doesn't allocate or make copies of buffers when sending
                    data. The caller's buffers are sent in-place. You can use any
                    object meeting the requirements of __ConstBufferSequence, permitting
                    efficient scatter-gather 