the distance to the exit node, if it has been computed</p></dd></dl><dl><dt class="spec value" id="val-get_exn"><a href="#val-get_exn" class="anchor"></a><code><span class="keyword">val</span> get_exn : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><a href="index.html#type-t">t</a> list</span></code></dt><dd><p>Get the exception nodes from the current node</p></dd></dl><dl><dt class="spec value" id="val-get_id"><a href="#val-get_id" class="anchor"></a><code><span class="keyword">val</span> 