">=</span> <span class="hl kwa">function</span><span class="hl opt">(</span>parent<span class="hl opt">,</span> output<span class="hl opt">,</span> indent<span class="hl opt">) {</span>
      <span class="hl kwa">var</span> _this <span class="hl opt">=</span> <span class="hl kwa">this</span><span class="hl opt">;</span>
      <span class="hl kwa">if</span> <span class="hl opt">(</span>indent <span class="hl opt">==</span> <span class="hl kwa">null</span><span class="hl opt">) {</span>
        indent <span c