</span> <a href="argument-3-A/index.html#type-t">t</a> := <a href="argument-1-D/index.html#type-t">D.t</a> <span class="keyword">and</span> <span class="keyword">type</span> <span>'a <a href="argument-3-A/index.html#type-arbitrary">arbitrary</a></span> := <span><span class="type-var">'a</span> <a href="../../argument-2-Q/index.html#type-arbitrary">Q.arbitrary</a></span></code></li></ul><h3 class="heading">Signature</h3><div class="spec module" id="module-V"><a href="#module-V" class="anchor"></a><code><span