sum2.update(4, 2);
Assert.assertTrue(Math.abs(sum.getValue() - sum.getValueNow(5d)) < PREC);
OnlineCannyAvgSummarizer combined = IOUtil.tryClone(sum1);
combined.combine(sum2);
OnlineCannyAvgSummarizer compl1 = IOUtil.tryClone(sum);
compl1.complement(sum1, false);
OnlineCannyAvgSummarizer compl2 = IOUtil.tryClone(sum);
compl2.complement(sum2, false);