<span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">virtual</span> <span class="keyword">int</span> <a class="link" href="test_observer.html#idp41388752-bb"><span class="identifier">priority</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="test_observer.html#idp41390448-bb">protected member functions</a></span>
  <span class="keyword">virtua