src/vs/workbench/api/browser/mainThreadLocalization.ts/MainThreadLocalization/$fetchBuiltInBundleUri
class MainThreadLocalization:	async $fetchBuiltInBundleUri(id: string): Promise<URI | undefined> {
		try {
			const uri = await this.languagePackService.getBuiltInExtensionTranslationsUri(id);
			return uri;
		} catch (e) {
			return undefined;
		}
	}