src/vs/platform/userDataSync/common/userDataSyncService.ts/UserDataSyncService/updateLastSyncTime
class UserDataSyncService:	private updateLastSyncTime(): void {
		if (this.status === SyncStatus.Idle) {
			this._lastSyncTime = new Date().getTime();
			this.storageService.store(LAST_SYNC_TIME_KEY, this._lastSyncTime, StorageScope.GLOBAL, StorageTarget.MACHINE);
			this._onDidChangeLastSyncTime.fire(this._lastSyncTime);
		}
	}