tructor anchored"><a href="#type-stimulus_desc.Value_change" class="anchor"></a><code><span>| </span><span><span class="constructor">Value_change</span> <span class="keyword">of</span> <span><span>(int * <a href="#type-expr">expr</a>)</span> list</span></span></code></li></ol></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-inst"><a href="#type-inst" class="anchor"></a><code><span><span class="keyword">and</span> inst</span><span> = <span><span>(<a href="#type-inst_desc">inst_desc