span>
<span class="w">  </span><span class="p">}</span>

<span class="w">  </span><span class="c1">// Is the current node a child of some other type of node?</span>
<span class="w">  </span><span class="nx">_childOf</span><span class="w"> </span><span class="p">(</span><span class="nx">nodeTypes</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="k">return</span><span class="w"> </span><span class="k">this</span><span class="p">.</span><span