>return</span> <span class="identifier">custom_controller</span><span class="special">();</span>
    <span class="special">}</span>
<span class="special">};</span>

<span class="special">}</span> <span class="special">}</span> <span class="special">}</span>
</pre>
<p>
      </p>
<p>
        This is all to use the <code class="computeroutput"><span class="identifier">make_controlled</span></code>
        mechanism. Now you can use your controller via
      </p>
<p>
</p>
<pre class="programlisting"><span clas