public void addStatisticsCollectorCallback(final StatisticsCollectorCallback callback) {
        final RocksStatisticsCollector collector = Requires.requireNonNull(this.statisticsCollector,
            "statisticsCollector");
        final Statistics statistics = Requires.requireNonNull(this.statistics, "statistics");
        collector.addStatsCollectorInput(new StatsCollectorInput(statistics, callback));
    }
Local KV store based on RocksDB

@author dennis
@author jiachun.fjc
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/storage/RocksRawKVStore.java