-B-Token-Multi-modal"> </a></h4><p>TODO: Implement this. Not working yet.</p>

</div>
</div>
</div>
    {% raw %}
    
<div class="cell border-box-sizing code_cell rendered">
<div class="input">

<div class="inner_cell">
    <div class="input_area">
<div class=" highlight hl-ipython3"><pre><span></span><span class="c1"># params.register_problem(problem_name=&#39;toy_cls&#39;, problem_type=&#39;cls&#39;, processing_fn=toy_cls)</span>
<span class="c1"># assert (10, 1)==toy_cls(params=params, mode=m3tl.TRAIN, 