;</span></span> bool)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?desc_of_sink</span>:<span>(<span><a href="Sink/index.html#type-t">Sink.t</a> <span class="arrow">&#45;&gt;</span></span> string)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="optlabel">?sink_should_nest</span>:<span>(<span><a href="Sink/index.html#type-t">Sink.t</a> <span class="arrow">&#45;&gt;</span></span> bool)</span> <span class="arrow">&#45;&gt;</span></span>
  <span><a hr