<span class="op">=</span> <span class="va">num_classes</span></span>
<span>      <span class="cn">NULL</span></span>
<span>    <span class="op">}</span>,</span>
<span>    build <span class="op">=</span> <span class="kw">function</span><span class="op">(</span><span class="va">self</span>,<span class="va">hp</span><span class="op">)</span> <span class="op">{</span></span>
<span>      <span class="va">model</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/pkg/keras/man/keras_model_se