hor"></a><code><span><span class="keyword">val</span> class_code : <span>string <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-boolean_st" class="anchored"><a href="#val-boolean_st" class="anchor"></a><code><span><span class="keyword">val</span> boolean_st : string</span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-byte_st" class="anchored"><a href="#val-byte_st" class="anchor"></a><code><span><s