code: private void initSystemRoutingStrategies(Cluster cluster) {
          HashMap<String, RoutingStrategy> routingStrategyMap = createRoutingStrategyMap(cluster,
                                                                                         makeStoreDefinitionMap(getSystemStoreDefList()));
          this.metadataCache.put(SYSTEM_ROUTING_STRATEGY_KEY,
                                 new Versioned<Object>(routingStrategyMap));
      }
docs: /*
  Initialize the routing strategy map for system stores. This is used
  during get / put on system stores.