pan class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="map.html#id673623-bb">private member functions</a></span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Combiner<span class="special">&gt;</span> <a class="link" href="map.html" title="Class template map">map</a> <span class="special">&amp;</span> <a class="link" href="map.html#id673626-bb"><span class="identifier">_add</span></a><span c