0%"><nobr>
        <span class="sympad"><a href="../../../../reference/java/util/concurrent/CompletionService.html#poll(long, java.util.concurrent.TimeUnit)">poll</a></span>(long timeout, <a href="../../../../reference/java/util/concurrent/TimeUnit.html">TimeUnit</a> unit)</nobr>
        
        <div class="jd-descrdiv">Retrieves and removes the Future representing the next
 completed task, waiting if necessary up to the specified wait
 time if none are yet present.</div>
  
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