public static HistogramData getHistogramData(final RocksRawKVStore rocksRawKVStore,
                                                 final HistogramType histogramType) {
        final Statistics statistics = statistics(rocksRawKVStore);
        if (statistics == null) {
            return null;
        }
        return statistics.getHistogramData(histogramType);
    }
Gets the histogram data for a particular histogram.
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/rocks/support/RocksStatistics.java