NULL == next )
<a name="l00427"></a>00427         <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00428"></a>00428     <span class="keywordflow">while</span> ( next != <span class="keyword">this</span> )
<a name="l00429"></a>00429     {
<a name="l00430"></a>00430         <span class="keywordflow">if</span> ( p == next )
<a name="l00431"></a>00431             <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00432"></a>00432         nex