 <span><span class="optlabel">?loss</span>:<a href="../Loss/index.html#type-typ">Loss.typ</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?learning_rate</span>:<a href="../Learning_Rate/index.html#type-typ">Learning_Rate.typ</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?regularisation</span>:<a href="../Regularisation/index.html#type-typ">Regularisation.typ</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?momentu