e></div><div class="spec-doc"><p><code>succs' s q</code> returns the list of immediate successors, with the associated transition label, of state <code>q</code> in <code>s</code>. Raise Invalid_argument if <code>q</code> is not in <code>s</code>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-preds"><a href="#val-preds" class="anchor"></a><code><span><span class="keyword">val</span> preds : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><a hre