ken class-name">Controller</span> <span class="token punctuation">{</span>
  isExpanded <span class="token operator">=</span> <span class="token boolean">false</span>

  @action
  <span class="token function">toggleBody</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">toggleProperty</span><span class="token punctuation"