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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a48565a4f21978fb249963ca8d2cbe2b4"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a48565a4f21978fb249963ca8d2cbe2b4"></a>
virtual void&#160;</td><td class="memItemRight" valign="bottom"><b>update</b> ()=0</t