span class="p">)</span> <span class="o">?</span> <span class="nx">obj</span><span class="p">.</span><span class="nx">slice</span><span class="p">()</span> <span class="o">:</span> <span class="nx">extend</span><span class="p">({},</span> <span class="nx">obj</span><span class="p">);</span>
<span class="p">}</span></pre></div>            </td>
          </tr>
                                      
          <tr id="extend" class="heading">
            <td class="docs">
              <div class="pilwrap">
   