 <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">m_message</span><span class="special">;</span>  <span class="comment">// log checkpoint message </span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp123284288"></a><h2>Description</h2>
<div class="refsect2">
<a name="idp123284704"></a><h3>
<a name="idp59990576-bb"></a><code class="computeroutput">log_checkpoint_data<