lass="keywordflow">if</span> (reverse)</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;                <span class="keywordflow">return</span> riterator != children.rend () ? *riterator : <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;            <span class="keywordflow">return</span> iterator != children.end () ? *iterator : <span class="keyword">nullptr</span>;</div><div class="line"><a name="l001