if (phase == null) {
                                    continue;
                                }
                                String tmpResolvedPhase = plan.aliases().getOrDefault(phase, phase);
                                String resolvedPhase = tmpResolvedPhase.startsWith(AT)
                                        ? tmpResolvedPhase.substring(AT.length())

     *
     * @param index the index configuration name
     */
    protected void sendConfigFiles(final String index) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        configListMap.getOrDefault(index, Collections.emptyList()).forEach(path -> {
            String source = null;
            final String filePath = indexConfigPath + "/" + index + "/" + path;
            final String dictionaryPath;

    if (value == null) {
      globalStatsCounter.recordMisses(1);
    } else {
      globalStatsCounter.recordHits(1);
    }
    return value;
  }

  @Override
  public @Nullable V getOrDefault(@Nullable Object key, @Nullable V defaultValue) {
    V result = get(key);
    return (result != null) ? result : defaultValue;
  }

  V getOrLoad(K key) throws ExecutionException {