docs: public String[] getStringArrayBySeparator(String key, String separator) {
      String value = getString(key);
      if (value != null) {
        String[] strings = StringUtils.splitByWholeSeparator(value, separator);
        String[] result = new String[strings.length];
        for (int index = 0; index < strings.length; index++) {
          result[index] = trim(strings[index]);
        }
        return result;
      }
      return ArrayUtils.EMPTY_STRING_ARRAY;
    }