hl opt">!=</span> <span class="hl kwa">null</span><span class="hl opt">) {</span>
      <span class="hl kwa">return</span> <span class="hl kwd">cb</span><span class="hl opt">(</span><span class="hl kwa">null</span><span class="hl opt">,</span> output<span class="hl opt">.</span><span class="hl kwd">final</span><span class="hl opt">());</span>
    <span class="hl opt">}</span>
  <span class="hl opt">};</span>

<span class="hl opt">}).</span><span class="hl kwd">call</span><span class="hl opt">(</span><span c