
          the message opcode will be set to text or binary based on the current setting
          of the <a class="link" href="binary.html" title="websocket::stream::binary"><code class="computeroutput"><span class="identifier">websocket</span><span class="special">::</span><span class="identifier">stream</span><span class="special">::</span><span class="identifier">binary</span></code></a> (or <a class="link" href="text.html" title="websocket::stream::text"><code class="computeroutput"><span class="identi