 the 'previous arc' of the shortest path tree for the given node.  <a href="#af9fdbb84b58bd3f5daedde027070e056">More...</a><br/></td></tr>
<tr class="separator:af9fdbb84b58bd3f5daedde027070e056 inherit pub_methods_a00051"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89bd1c535e3d4fcb9c58afbb54ac47e1 inherit pub_methods_a00051"><td class="memItemLeft" align="right" valign="top">Node&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00051.html#a89bd1c535e3d4fc