div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        <span class="keyword">protected</span>:</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;            <span class="keyword">virtual</span> <span class="keywordtype">void</span> Update(<span class="keywordtype">size_t</span> index_i, Real dt = 0.0) <span class="keyword">override</span>;</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;        };</div><di