a><span class="lineno">   45</span><span class="keyword">namespace </span>priv</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>{</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>    <span class="keyword">class </span>WindowImpl;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>}</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class