walker</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="ow">new</span><span class="w"> </span><span class="nx">VariableWalker</span><span class="p">(</span><span class="nx">ast</span><span class="p">)</span>
<span class="kd">const</span><span class="w"> </span><span class="nx">accumulator</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[]</span>
<span class="nx">walker</span><span class="p">.</span><span class="nx">walk<