private static function populate() {
    $arr = array();
    $epoch = 0;
    if (!isset(self::$BuildVer) || !is_array(self::$BuildVer)) {
      require __DIR__ .'/data.php';
      if (empty($arr) || !is_array($arr) || empty($epoch)) {
        throw new \Exception('Error fetching file data.php');
      }
      self::$DataTimestamp = $epoch;
      self::$BuildVer = $arr;
    }
  }