"constructor">Valid</span></span></code></li><li id="type-state.Invalid" class="def variant constructor anchored"><a href="#type-state.Invalid" class="anchor"></a><code><span>| </span><span><span class="constructor">Invalid</span></span></code></li></ol></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-t"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> t</span><span> = <span><a href="#type-attr">attr</a> <a href="../../Owl_graph/index.html#type-no