tion-6">&#182;</a>
              </div>
              <p>A key is necessary for pie charts</p>

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            <div class="content"><div class='highlight'><pre>            key: <span class="hljs-function">(<span class="hljs-params">d</span>) =&gt;</span> d.id,
            value: <span class="hljs-function">(<span class="hljs-params">d</span>) =&gt;</span> d.value,
            sort: <span class="hljs-literal">false</span>,</pre></div></div>
            
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