s="p">)</span> <span class="o">-&gt;</span> <span class="n">Tensor</span><span class="p">:</span>
        <span class="k">return</span> <span class="n">grad_y</span>

    <span class="nd">@staticmethod</span>
    <span class="k">def</span><span class="w"> </span><span class="nf">symbolic</span><span class="p">(</span><span class="n">g</span><span class="p">,</span> <span class="n">x</span><span class="p">:</span> <span class="n">Tensor</span><span class="p">):</span>
        <span class="nb">abs</span> <spa