ugh the
                  buffers object may be copied as necessary, ownership of the underlying
                  memory blocks is retained by the caller, which must guarantee that
                  they remain valid until the handler is called.
                </p></dd>
<dt><span class="term">flags</span></dt>
<dd><p>
                  Flags specifying how the send call is to be made.
                </p></dd>
<dt><span class="term">handler</span></dt>
<dd>
<p>
                  The handler to be called w