tMap.t</a></span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> option</span></span></code></div><div class="spec-doc"><p>extract the precondition for a node id from the given invariant map</p></div></div><div class="odoc-spec"><div class="spec value" id="val-extract_state" class="anchored"><a href="#val-extract_state" class="anchor"></a><code><span><span class="keyword">val</span> extract_state : <span><a href="argument-1-T/CFG/Node/IdMap/index.html#type-key">InvariantM