src/vs/platform/userDataSync/common/userDataSyncIpc.ts/UserDataAutoSyncChannel/call
class UserDataAutoSyncChannel:	call(context: any, command: string, args?: any): Promise<any> {
		switch (command) {
			case 'triggerSync': return this.service.triggerSync(args[0], args[1], args[2]);
			case 'turnOn': return this.service.turnOn();
			case 'turnOff': return this.service.turnOff(args[0]);
		}
		throw new Error('Invalid call');
	}