> <span class="token keyword">class</span> <span class="token class-name">TodoComponent</span> <span class="token keyword">extends</span> <span class="token class-name">Component</span> <span class="token punctuation">{</span>
  @action
  <span class="token function">toggleCompleted</span><span class="token punctuation">(</span><span class="token parameter">isComplete</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token comment">// ...</span>
  <span