a> <span class="arrow">&#45;&gt;</span></span> string</span></code></div><div class="spec-doc"><p>A synonym of <a href="Attr/index.html#val-to_string"><code>Attr.to_string</code></a></p></div></div><h2 id="inspectors"><a href="#inspectors" class="anchor"></a>Inspectors</h2><div class="odoc-spec"><div class="spec value anchored" id="val-is_state"><a href="#val-is_state" class="anchor"></a><code><span><span class="keyword">val</span> is_state : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span