span><span> = </span></code><ol><li id="type-elt.Elt" class="def variant constructor anchored"><a href="#type-elt.Elt" class="anchor"></a><code><span>| </span><span><span class="constructor">Elt</span> <span class="keyword">of</span> <a href="#type-t">t</a></span></code></li></ol></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-op"><a href="#type-op" class="anchor"></a><code><span><span class="keyword">and</span> op</span><span> = </span></code><ol><li id="type-op.Noop" class="def