public static function registerTranslation($prefix, $basePath, array $fileMap)
    {
        if (!isset(Yii::$app->i18n->translations[$prefix])) {
            Yii::$app->i18n->translations[$prefix] = [
                'class' => 'yii\i18n\PhpMessageSource',
                'basePath' => $basePath,
                'fileMap' => $fileMap,
            ];
        }
    }