pan><span class="n">coords_der</span><span class="p">,</span> <span class="n">data_der</span><span class="p">,</span> <span class="n">shape</span><span class="o">=</span><span class="n">shape_der</span><span class="p">)</span>
            <span class="k">return</span> <span class="p">((</span><span class="n">derivatives</span><span class="p">,),</span> <span class="n">index</span><span class="p">)</span>

        <span class="k">if</span> <span class="n">return_descriptor</span><span class="p">:</span>
    