src/vs/platform/userDataSync/common/abstractSynchronizer.ts/AbstractSynchroniser/writeLastSyncStoredRemoteUserData
class AbstractSynchroniser:	private async writeLastSyncStoredRemoteUserData(lastSyncRemoteUserData: IRemoteUserData): Promise<void> {
		await this.fileService.writeFile(this.lastSyncResource, VSBuffer.fromString(JSON.stringify(lastSyncRemoteUserData)));
	}