/**
  * Add debug log message
  *
  * @since 1.0
  *
  * @param string $message
  */
 public static function add_debug_log($message)
 {
     if (!is_object(self::$log)) {
         self::$log = WooCommerce_Grow_Compat::get_wc_logger();
     }
     if (self::is_debug_enabled()) {
         self::$log->add('wc_grow', $message);
     }
 }