src/vs/platform/localizations/node/localizations.ts/LocalizationsService/constructor
class LocalizationsService:	constructor(
		@IExtensionManagementService private readonly extensionManagementService: IExtensionManagementService,
		@INativeEnvironmentService environmentService: INativeEnvironmentService,
		@ILogService private readonly logService: ILogService
	) {
		super();
		this.cache = this._register(new LanguagePacksCache(environmentService, logService));
		this.extensionManagementService.registerParticipant({
			postInstall: async (extension: ILocalExtension): Promise<void> => {
				return this.postInstallExtension(extension);
			},
			postUninstall: async (extension: ILocalExtension): Promise<void> => {
				return this.postUninstallExtension(extension);
			}
		});
	}