 class="special">);</span>
        <span class="identifier">m_times</span><span class="special">.</span><span class="identifier">push_back</span><span class="special">(</span> <span class="identifier">t</span> <span class="special">);</span>
    <span class="special">}</span>
<span class="special">};</span>
</pre>
<p>
      </p>
<p>
        which stores the intermediate steps in a container. Note, the argument structure
        of the ()-operator: odeint calls the observer exactly in this way, providing
   