src/vs/platform/userDataSync/common/globalStateSync.ts/GlobalStateSynchroniser/updateArgv
class GlobalStateSynchroniser:	private async updateArgv(argv: IStringDictionary<any>): Promise<void> {
		const argvContent = await this.getLocalArgvContent();
		let content = argvContent;
		for (const argvProperty of Object.keys(argv)) {
			content = edit(content, [argvProperty], argv[argvProperty], {});
		}
		if (argvContent !== content) {
			this.logService.trace(`${this.syncResourceLogLabel}: Updating locale...`);
			await this.fileService.writeFile(this.environmentService.argvResource, VSBuffer.fromString(content));
			this.logService.info(`${this.syncResourceLogLabel}: Updated locale.`);
		}
	}