actor() <span class="keyword">const</span> = 0;
<a name="l00193"></a>00193 
<a name="l00194"></a>00194   <span class="comment">// set nbest</span>
<a name="l00195"></a>00195   <span class="keyword">virtual</span> <span class="keywordtype">void</span> set_nbest(<span class="keywordtype">size_t</span> nbest) = 0;
<a name="l00196"></a>00196 
<a name="l00197"></a>00197   <span class="comment">// get nbest</span>
<a name="l00198"></a>00198   <span class="keyword">virtual</span> <span class="keywordtype">size_t</