   iterator_A.clear_mask();</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;      iterator_B.clear_mask();</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;    }</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    <span class="comment">//</