>return</span> <span class="identifier">m_data_available</span><span class="special">;</span> <span class="special">}</span>

<span class="keyword">protected</span><span class="special">:</span>
    <span class="comment">/// Stream to read the message body.</span>
    <span class="identifier">concurrency</span><span class="special">::</span><span class="identifier">streams</span><span class="special">::</span><span class="identifier">istream</span> <span class="identifier">m_inStream</span><span class="spec