docs: public static void printStoreMap(Reflections reflections) {
  
          LOGGER.info("Now we will print store map......");
  
          Store store = reflections.getStore();
          Map<String/* indexName */, Multimap<String, String>> storeMap = store.getStoreMap();
          for (String indexName : storeMap.keySet()) {
  
              LOGGER.info("====================================");
              LOGGER.info("indexName:" + indexName);
  
              Multimap<String, String> multimap = storeMap.get(indexName);
  
              for (String firstName : multimap.keySet()) {
                  Collection<String> lastNames = multimap.get(firstName);
                  LOGGER.info("\t\t" + firstName + ": " + lastNames);
              }
  
          }
      }