span class="special">{</span>

  <span class="comment">// <a class="link" href="FormatterConcept.html#idp81596032-bb">public member functions</a></span>
  <span class="keyword">void</span> <a class="link" href="FormatterConcept.html#idp81596240-bb"><span class="identifier">constraints</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
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<a name="idp164308096"></a><h