java.util.concurrent.cancellationException que muestra en sugerencia

@Override
public C get() throws InterruptedException, ExecutionException
{
  _latch.await();
  if (_cause==COMPLETED)
    return _result;
  if (_cause instanceof CancellationException)
    throw (CancellationException) new CancellationException().initCause(_cause);
  throw new ExecutionException(_cause);
}
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