t">// This won't work!</span>
      <span class="token keyword">let</span> categories <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token string">'categories'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
      categories<span class="token punctuation">[</span>category<span class="token punctuation">]</span