code: protected function handleEventMessage(array $message)
      {
          Log::debug('OpenPlatform Event Message detail:', $message);
  
          $message = new Collection($message);
  
          $infoType = $message->get('InfoType');
  
          if ($handler = $this->getHandler($infoType)) {
              $handler->handle($message);
          } else {
              Log::notice("No existing handler for '{$infoType}'.");
          }
  
          if ($messageHandler = $this->getMessageHandler()) {
              call_user_func_array($messageHandler, [$message]);
          }
      }
docs: Handle event message.
  
  @param array $message