ss="hl opt">{</span>
        <span class="hl kwa">return this</span><span class="hl opt">.</span>jsdom<span class="hl opt">.</span><span class="hl kwd">env</span><span class="hl opt">(</span>arg<span class="hl opt">,</span> cb<span class="hl opt">);</span>
      <span class="hl opt">}</span>
    <span class="hl opt">};</span>

    <span class="hl kwa">return</span> Parser<span class="hl opt">;</span>

  <span class="hl opt">})();</span>

  Writer <span class="hl opt">= (</span><span class="hl kwa">function<