e module <code>typ</code> with default values.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-config"><a href="#val-config" class="anchor"></a><code><span><span class="keyword">val</span> config : 
  <span><span class="optlabel">?batch</span>:<a href="../Batch/index.html#type-typ">Batch.typ</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?gradient</span>:<a href="../Gradient/index.html#type-typ">Gradient.typ</a> <span class="arrow">&#45;&gt;</sp