code: @Override
      public final Health health() {
          final Builder upBuilder = Health.up();
          final Map<String, Object> cacheMap = new HashMap<>();
          upBuilder.withDetail("version", appInfo.getVersion());
          cacheMap.put("size", gcc.size());
          cacheMap.put("geocoded", gcc.size() - gcc.countNotFound());
          upBuilder.withDetail("cache", cacheMap);
          return upBuilder.build();
      }
docs: {@inheritDoc}