espect to the feature maps.
</p><div class="prototype"><code class="lang-d"><div class="single-prototype">
<a href="../../../../dopt/core/ops/Operation.html"><span class="typ">Operation</span></a> <span class="pln">maxpoolGrad</span>
<span class="pun">(</span>
<br/>
&nbsp;&nbsp;<a href="../../../../dopt/core/ops/Operation.html"><span class="typ">Operation</span></a> <span class="pln">parentGrad</span><span class="pun">,</span>
<br/>
&nbsp;&nbsp;<a href="../../../../dopt/core/ops/Operation.html"><span class=