public static function createBlame($user, $config = [])
    {
        if (!($user instanceof BaseUserModel)) {
            $message = 'the type of user instance must be the extended class of BaseUserModel.';
            throw new InvalidParamException($message);
        }
        $mbClass = static::buildNoInitModel();
        $mbi = $mbClass->multiBlamesClass;
        return $user->create($mbi::className(), $config);
    }