e><span><span class="keyword">val</span> symbols' : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-symbol">symbol</a> list</span></span></code></div><div class="spec-doc"><p>Returns the set of symbols as a list</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-acc_states"><a href="#val-acc_states" class="anchor"></a><code><span><span class="keyword">val</span> acc_states : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;