an class="identifier">m_data_available</span><span class="special">;</span>
<span class="special">};</span>
</pre>
<p>
        To understand these declarations we need to first understand that cpprestsdk
        uses the asynchronous model defined by Microsoft's <a href="https://msdn.microsoft.com/en-us/library/dd504870.aspx" target="_top"><span class="bold"><strong>Concurrency Runtime</strong></span></a>. Identifiers from the
        <a href="https://msdn.microsoft.com/en-us/library/jj987780.aspx" target="