final protected function getValueFromConfig(string $param)
  {
    $value = null;
    $config = self::$suiteConfig;

    preg_match_all(self::$regEx['config'], $param, $args, PREG_PATTERN_ORDER);
    foreach ($args[1] as $arg) {
      if (array_key_exists($arg, $config)) {
        $value = $config[$arg];
        if (is_array($value)) {
          $config = $value;
        } else {
          break;
        }
      }
    }
    return $value;
  }