e middle *unique* class that resolve possible ambiguity</span>
<a name="l00076"></a>00076     <span class="keyword">template</span> &lt;<span class="keyword">class</span> T1, <span class="keyword">class</span> T2, <span class="keyword">template</span> &lt;<span class="keyword">class</span>&gt; <span class="keyword">class </span>Unit&gt;
<a name="l00077"></a><a class="code" href="a00201.html">00077</a>     <span class="keyword">class </span><a class="code" href="a00199.html">GenScatterHierarchy</a>&lt;Privat