_description : <a href="../../../IStdlib/Pp/index.html#type-env">IStdlib.Pp.env</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> string</code></dt><dd><p>Return a description of the node</p></dd></dl><dl><dt class="spec value" id="val-get_distance_to_exit"><a href="#val-get_distance_to_exit" class="anchor"></a><code><span class="keyword">val</span> get_distance_to_exit : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span>int option</span></code></dt><dd><p>Get 