 class="mdescLeft">&#160;</td><td class="mdescRight">Return a unique integer id for the given arc.  <a href="#afd45d1418e059c067e3a648b862fdd30">More...</a><br/></td></tr>
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<tr class="memitem:a58a883bb07c2bbd1819a277b21bf2964 inherit pub_methods_a00205"><td class="memItemLeft" align="right" valign="top">Arc&#160;</td><td class="memItemRight" valign="bottom"><a class="el" hr