code: @Override
    public Config getOwnConfig(final ConfigKeyPath configKey) {
      try {
        return this.ownConfigCache.get(configKey, new Callable<Config>() {
          @Override
          public Config call()  {
            return InMemoryValueInspector.this.valueFallback.getOwnConfig(configKey);
          }
        });
      } catch (ExecutionException e) {
        // should NOT come here
        throw new RuntimeException("Can not getOwnConfig for " + configKey);
      }
    }
docs: {@inheritDoc}.
  
  <p>
  If present in the cache, return the cached {@link com.typesafe.config.Config} for given input
  Otherwise, simply delegate the functionality to the internal {ConfigStoreValueInspector} and store the value into cache
  </p>