 parent<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">class</span> <span class="token class-name">Parent</span> <span class="token punctuation">{</span>
  child <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Child</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">)</span><span