* @param key The key of the setting.
     * @param defaultValue The default value if the setting is not found.
     * @return The setting value as a boolean.
     */
    public boolean getAsBoolean(final String key, final boolean defaultValue) {
        final Object obj = get(key);

        final boolean value;
        if (obj == null) {
            value = defaultValue;
        } else {

        langFieldName = settings.getAsString(SuggestSettings.DefaultKeys.LANG_FIELD_NAME, StringUtil.EMPTY);
        parallel = settings.getAsBoolean(SuggestSettings.DefaultKeys.PARALLEL_PROCESSING, false);
        this.readingConverter = readingConverter;
        this.contentsReadingConverter = contentsReadingConverter;
        this.normalizer = normalizer;

  public Guard newGuard(BooleanSupplier isSatisfied) {
    checkNotNull(isSatisfied, "isSatisfied");
    return new Guard(this) {
      @Override
      public boolean isSatisfied() {
        return isSatisfied.getAsBoolean();
      }
    };
  }

  /** Enters this monitor. Blocks indefinitely. */
  public void enter() {
    lock.lock();
  }

  /**
   * Enters this monitor. Blocks at most the given time.