ss="p">(</span><span class="nx">node</span><span class="p">,</span><span class="w"> </span><span class="nx">accumulator</span><span class="p">)</span>
<span class="w">    </span><span class="p">}</span>
<span class="w">  </span><span class="p">}</span>

<span class="w">  </span><span class="c1">// Handle a single node by lookup.</span>
<span class="w">  </span><span class="nx">_doNode</span><span class="w"> </span><span class="p">(</span><span class="nx">node</span><span class="p">,</span><span class="w"> <