Buffer"><span class="Identifier">AsyncBuffer</span></a><span class="Other">;</span> <span class="Identifier">cancelFut</span><span class="Other">:</span> <span class="Identifier">Future</span><span class="Other">[</span><span class="Identifier">void</span><span class="Other">]</span> <span class="Other">=</span> <span class="Keyword">nil</span><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">Future</span><span class="Other">[</span><span class="Identifier">int</span><span cl