code: @JmxGetter(name = "avgFetchKeysNetworkTimeMs", description = "average time spent on network, for fetch keys")
      public double getAvgFetchKeysNetworkTimeMs() {
          return networkTimeCounterMap.get(Operation.FETCH_KEYS).getAvgEventValue() / Time.NS_PER_MS;
      }
docs: Mbeans for FETCH_KEYS