       <span class="hljs-keyword">new</span> c3.Polar.Layer.Arc&lt;PolarPlotDatum&gt;({
            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,</pre></div></div>
            
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