type-t">Node.t</a>, <span class="type-var">'accum</span>)</span> <a href="../../../../IStdlib/index.html#module-IStd">IStdlib.IStd</a>.Container.fold</span></code></dt><dd><p>fold over all successors (normal and exceptional)</p></dd></dl><dl><dt class="spec value" id="val-fold_preds"><a href="#val-fold_preds" class="anchor"></a><code><span class="keyword">val</span> fold_preds : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><span>(<a href="Node/index.html#type-t">Node.t</a>, <a href="Node